[clang] [flang] [llvm] [mlir] [TargetRegistry] Accept Triple in createTargetMachine() (NFC) (PR #130940)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `flang-aarch64-libcxx` running on `linaro-flang-aarch64-libcxx` while building `bolt,clang,flang,llvm,mlir,offload` at step 5 "build-unified-tree".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/89/builds/18479

<details>
<summary>Here is the relevant piece of the build log for the reference</summary>

```
Step 5 (build-unified-tree) failure: build (failure)
...
149.293 [146/8/7229] Linking CXX executable bin/llvm-jitlink
151.487 [146/7/7230] Building CXX object tools/sancov/CMakeFiles/sancov.dir/sancov.cpp.o
151.588 [145/7/7231] Linking CXX executable bin/sancov
157.261 [145/6/7232] Building CXX object tools/llvm-opt-fuzzer/CMakeFiles/llvm-opt-fuzzer.dir/llvm-opt-fuzzer.cpp.o
157.422 [144/6/7233] Linking CXX executable bin/llvm-opt-fuzzer
157.505 [144/5/7234] Building CXX object tools/llvm-objdump/CMakeFiles/llvm-objdump.dir/MachODump.cpp.o
166.380 [144/4/7235] Building CXX object tools/llvm-objdump/CMakeFiles/llvm-objdump.dir/llvm-objdump.cpp.o
166.509 [143/4/7236] Linking CXX executable bin/llvm-objdump
166.516 [142/4/7237] Generating ../../bin/llvm-otool
167.594 [142/3/7238] Building CXX object tools/flang/lib/Frontend/CMakeFiles/flangFrontend.dir/CompilerInstance.cpp.o
FAILED: tools/flang/lib/Frontend/CMakeFiles/flangFrontend.dir/CompilerInstance.cpp.o 
/usr/local/bin/c++ -DFLANG_INCLUDE_TESTS=1 -DFLANG_LITTLE_ENDIAN=1 -DGTEST_HAS_RTTI=0 -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/tcwg-buildbot/worker/flang-aarch64-libcxx/build/tools/flang/lib/Frontend -I/home/tcwg-buildbot/worker/flang-aarch64-libcxx/llvm-project/flang/lib/Frontend -I/home/tcwg-buildbot/worker/flang-aarch64-libcxx/llvm-project/flang/include -I/home/tcwg-buildbot/worker/flang-aarch64-libcxx/build/tools/flang/include -I/home/tcwg-buildbot/worker/flang-aarch64-libcxx/build/include -I/home/tcwg-buildbot/worker/flang-aarch64-libcxx/llvm-project/llvm/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-libcxx/llvm-project/flang/../mlir/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-libcxx/build/tools/mlir/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-libcxx/build/tools/clang/include -isystem /home/tcwg-buildbot/worker/flang-aarch64-libcxx/llvm-project/llvm/../clang/include -stdlib=libc++ -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -Werror=unguarded-availability-new -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wmissing-field-initializers -pedantic -Wno-long-long -Wc++98-compat-extra-semi -Wimplicit-fallthrough -Wcovered-switch-default -Wno-noexcept-type -Wnon-virtual-dtor -Wdelete-non-virtual-dtor -Wsuggest-override -Wstring-conversion -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -Werror -Wno-deprecated-copy -Wno-string-conversion -Wno-ctad-maybe-unsupported -Wno-unused-command-line-argument -Wstring-conversion           -Wcovered-switch-default -Wno-nested-anon-types -O3 -DNDEBUG -std=c++17 -fPIC  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/flang/lib/Frontend/CMakeFiles/flangFrontend.dir/CompilerInstance.cpp.o -MF tools/flang/lib/Frontend/CMakeFiles/flangFrontend.dir/CompilerInstance.cpp.o.d -o tools/flang/lib/Frontend/CMakeFiles/flangFrontend.dir/CompilerInstance.cpp.o -c /home/tcwg-buildbot/worker/flang-aarch64-libcxx/llvm-project/flang/lib/Frontend/CompilerInstance.cpp
../llvm-project/flang/lib/Frontend/CompilerInstance.cpp:375:34: error: 'createTargetMachine' is deprecated: Use overload accepting Triple instead [-Werror,-Wdeprecated-declarations]
  375 |   targetMachine.reset(theTarget->createTargetMachine(
      |                                  ^
../llvm-project/llvm/include/llvm/MC/TargetRegistry.h:466:5: note: 'createTargetMachine' has been explicitly marked deprecated here
  466 |   [[deprecated("Use overload accepting Triple instead")]]
      |     ^
1 error generated.
171.864 [142/2/7239] Building CXX object tools/flang/tools/flang-driver/CMakeFiles/flang.dir/fc1_main.cpp.o
244.098 [142/1/7240] Building CXX object tools/flang/tools/bbc/CMakeFiles/bbc.dir/bbc.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/130940