[llvm] [WebAssembly] Split and tidy up target features test (PR #96735)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `llvm-clang-aarch64-darwin` running on `doug-worker-4` while building `llvm` at step 6 "test-build-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/190/builds/749

Here is the relevant piece of the build log for the reference:
```
Step 6 (test-build-unified-tree-check-all) failure: test (failure)
******************** TEST 'lit :: shtest-define.py' FAILED ********************
Exit Code: 1

Command Output (stdout):
--
# RUN: at line 3
echo '-- Available Tests --' > /Users/buildbot/buildbot-root/aarch64-darwin/build/utils/lit/tests/Output/shtest-define.py.tmp.tests.actual.txt
# executed command: echo '-- Available Tests --'
# RUN: at line 22
not env -u FILECHECK_OPTS "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9" /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va   Inputs/shtest-define/errors/assignment/before-name.txt 2>&1 | FileCheck -match-full-lines  Inputs/shtest-define/errors/assignment/before-name.txt -dump-input-filter=all -vv -color && echo '  shtest-define :: errors/assignment/before-name.txt' >> /Users/buildbot/buildbot-root/aarch64-darwin/build/utils/lit/tests/Output/shtest-define.py.tmp.tests.actual.txt
# executed command: not env -u FILECHECK_OPTS /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9 /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va Inputs/shtest-define/errors/assignment/before-name.txt
# executed command: FileCheck -match-full-lines Inputs/shtest-define/errors/assignment/before-name.txt -dump-input-filter=all -vv -color
# executed command: echo '  shtest-define :: errors/assignment/before-name.txt'
# RUN: at line 24
not env -u FILECHECK_OPTS "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9" /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va   Inputs/shtest-define/errors/assignment/between-name-equals.txt 2>&1 | FileCheck -match-full-lines  Inputs/shtest-define/errors/assignment/between-name-equals.txt -dump-input-filter=all -vv -color && echo '  shtest-define :: errors/assignment/between-name-equals.txt' >> /Users/buildbot/buildbot-root/aarch64-darwin/build/utils/lit/tests/Output/shtest-define.py.tmp.tests.actual.txt
# executed command: not env -u FILECHECK_OPTS /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9 /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va Inputs/shtest-define/errors/assignment/between-name-equals.txt
# executed command: FileCheck -match-full-lines Inputs/shtest-define/errors/assignment/between-name-equals.txt -dump-input-filter=all -vv -color
# executed command: echo '  shtest-define :: errors/assignment/between-name-equals.txt'
# RUN: at line 26
not env -u FILECHECK_OPTS "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9" /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va   Inputs/shtest-define/errors/assignment/braces-empty.txt 2>&1 | FileCheck -match-full-lines  Inputs/shtest-define/errors/assignment/braces-empty.txt -dump-input-filter=all -vv -color && echo '  shtest-define :: errors/assignment/braces-empty.txt' >> /Users/buildbot/buildbot-root/aarch64-darwin/build/utils/lit/tests/Output/shtest-define.py.tmp.tests.actual.txt
# executed command: not env -u FILECHECK_OPTS /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9 /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va Inputs/shtest-define/errors/assignment/braces-empty.txt
# executed command: FileCheck -match-full-lines Inputs/shtest-define/errors/assignment/braces-empty.txt -dump-input-filter=all -vv -color
# executed command: echo '  shtest-define :: errors/assignment/braces-empty.txt'
# RUN: at line 28
not env -u FILECHECK_OPTS "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9" /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va   Inputs/shtest-define/errors/assignment/braces-with-dot.txt 2>&1 | FileCheck -match-full-lines  Inputs/shtest-define/errors/assignment/braces-with-dot.txt -dump-input-filter=all -vv -color && echo '  shtest-define :: errors/assignment/braces-with-dot.txt' >> /Users/buildbot/buildbot-root/aarch64-darwin/build/utils/lit/tests/Output/shtest-define.py.tmp.tests.actual.txt
# executed command: not env -u FILECHECK_OPTS /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9 /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va Inputs/shtest-define/errors/assignment/braces-with-dot.txt
# executed command: FileCheck -match-full-lines Inputs/shtest-define/errors/assignment/braces-with-dot.txt -dump-input-filter=all -vv -color
# executed command: echo '  shtest-define :: errors/assignment/braces-with-dot.txt'
# RUN: at line 30
not env -u FILECHECK_OPTS "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9" /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va   Inputs/shtest-define/errors/assignment/braces-with-equals.txt 2>&1 | FileCheck -match-full-lines  Inputs/shtest-define/errors/assignment/braces-with-equals.txt -dump-input-filter=all -vv -color && echo '  shtest-define :: errors/assignment/braces-with-equals.txt' >> /Users/buildbot/buildbot-root/aarch64-darwin/build/utils/lit/tests/Output/shtest-define.py.tmp.tests.actual.txt
# executed command: not env -u FILECHECK_OPTS /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9 /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va Inputs/shtest-define/errors/assignment/braces-with-equals.txt
# executed command: FileCheck -match-full-lines Inputs/shtest-define/errors/assignment/braces-with-equals.txt -dump-input-filter=all -vv -color
# executed command: echo '  shtest-define :: errors/assignment/braces-with-equals.txt'
# RUN: at line 32
not env -u FILECHECK_OPTS "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9" /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va   Inputs/shtest-define/errors/assignment/braces-with-newline.txt 2>&1 | FileCheck -match-full-lines  Inputs/shtest-define/errors/assignment/braces-with-newline.txt -dump-input-filter=all -vv -color && echo '  shtest-define :: errors/assignment/braces-with-newline.txt' >> /Users/buildbot/buildbot-root/aarch64-darwin/build/utils/lit/tests/Output/shtest-define.py.tmp.tests.actual.txt
# executed command: not env -u FILECHECK_OPTS /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9 /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va Inputs/shtest-define/errors/assignment/braces-with-newline.txt
# executed command: FileCheck -match-full-lines Inputs/shtest-define/errors/assignment/braces-with-newline.txt -dump-input-filter=all -vv -color
# executed command: echo '  shtest-define :: errors/assignment/braces-with-newline.txt'
# RUN: at line 34
not env -u FILECHECK_OPTS "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9" /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va   Inputs/shtest-define/errors/assignment/braces-with-number.txt 2>&1 | FileCheck -match-full-lines  Inputs/shtest-define/errors/assignment/braces-with-number.txt -dump-input-filter=all -vv -color && echo '  shtest-define :: errors/assignment/braces-with-number.txt' >> /Users/buildbot/buildbot-root/aarch64-darwin/build/utils/lit/tests/Output/shtest-define.py.tmp.tests.actual.txt
# executed command: not env -u FILECHECK_OPTS /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9 /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va Inputs/shtest-define/errors/assignment/braces-with-number.txt
# executed command: FileCheck -match-full-lines Inputs/shtest-define/errors/assignment/braces-with-number.txt -dump-input-filter=all -vv -color
# executed command: echo '  shtest-define :: errors/assignment/braces-with-number.txt'
# RUN: at line 36
not env -u FILECHECK_OPTS "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9" /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va   Inputs/shtest-define/errors/assignment/braces-with-ws.txt 2>&1 | FileCheck -match-full-lines  Inputs/shtest-define/errors/assignment/braces-with-ws.txt -dump-input-filter=all -vv -color && echo '  shtest-define :: errors/assignment/braces-with-ws.txt' >> /Users/buildbot/buildbot-root/aarch64-darwin/build/utils/lit/tests/Output/shtest-define.py.tmp.tests.actual.txt
# executed command: not env -u FILECHECK_OPTS /Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9 /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va Inputs/shtest-define/errors/assignment/braces-with-ws.txt
# executed command: FileCheck -match-full-lines Inputs/shtest-define/errors/assignment/braces-with-ws.txt -dump-input-filter=all -vv -color
# executed command: echo '  shtest-define :: errors/assignment/braces-with-ws.txt'
# RUN: at line 38
not env -u FILECHECK_OPTS "/Library/Developer/CommandLineTools/Library/Frameworks/Python3.framework/Versions/3.9/bin/python3.9" /Users/buildbot/buildbot-root/aarch64-darwin/llvm-project/llvm/utils/lit/lit.py -j1 --order=lexical -va   Inputs/shtest-define/errors/assignment/empty.txt 2>&1 | FileCheck -match-full-lines  Inputs/shtest-define/errors/assignment/empty.txt -dump-input-filter=all -vv -color && echo '  shtest-define :: errors/assignment/empty.txt' >> /Users/buildbot/buildbot-root/aarch64-darwin/build/utils/lit/tests/Output/shtest-define.py.tmp.tests.actual.txt
...

```

https://github.com/llvm/llvm-project/pull/96735