[clang] [clang][Interp] Merge ByteCodeExprGen and ByteCodeStmtGen (PR #83683)

[LLVM Continuous Integration via cfe-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `ppc64le-lld-multistage-test` running on `ppc64le-lld-multistage-test` while building `clang` at step 7 "test-build-stage1-unified-tree-check-all".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/168/builds/446

Here is the relevant piece of the build log for the reference:
```
Step 7 (test-build-stage1-unified-tree-check-all) failure: test (failure)
******************** TEST 'Clang :: Driver/cl-inputs.c' FAILED ********************
Exit Code: 1

Command Output (stderr):
--
RUN: at line 4: /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/bin/clang --driver-mode=cl /TC -### -- /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/clang/test/Driver/cl-inputs.c 2>&1 | /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/bin/FileCheck -check-prefix=TC /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/clang/test/Driver/cl-inputs.c
+ /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/bin/clang --driver-mode=cl /TC -### -- /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/clang/test/Driver/cl-inputs.c
+ /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/bin/FileCheck -check-prefix=TC /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/clang/test/Driver/cl-inputs.c
/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/clang/test/Driver/cl-inputs.c:7:12: error: TC-NOT: excluded string found in input
// TC-NOT: note
           ^
<stdin>:8:99: note: found here
 "link.exe" "-out:cl-inputs.exe" "-libpath:lib" "-libpath:atlmfc/lib" "-nologo" "/tmp/lit-tmp-hoegnote/cl-inputs-72e484.obj"
                                                                                                  ^~~~

Input file: <stdin>
Check file: /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/clang/test/Driver/cl-inputs.c

-dump-input=help explains the following input dump.

Input was:
<<<<<<
       1: clang version 19.0.0git (https://github.com/llvm/llvm-project.git 468d668c5c4031366ae38804927b450f9faf409c) 
       2: Target: powerpc64le-pc-windows-msvc 
       3: Thread model: posix 
       4: InstalledDir: /home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/bin 
       5: Build config: +assertions 
       6: clang: warning: unable to find a Visual Studio installation; try running Clang from a developer command prompt [-Wmsvc-not-found] 
       7:  "/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/bin/clang-19" "-cc1" "-triple" "powerpc64le-pc-windows-msvc19.33.0" "-emit-obj" "-mincremental-linker-compatible" "-dumpdir" "a-" "-disable-free" "-clear-ast-before-backend" "-main-file-name" "cl-inputs.c" "-mrelocation-model" "static" "-mframe-pointer=all" "-relaxed-aliasing" "-fmath-errno" "-ffp-contract=on" "-fno-rounding-math" "-mconstructor-aliases" "-target-cpu" "ppc64le" "-mfloat-abi" "hard" "-target-abi" "elfv2" "-D_MT" "-flto-visibility-public-std" "--dependent-lib=libcmt" "--dependent-lib=oldnames" "-stack-protector" "2" "-fdiagnostics-format" "msvc" "-fdebug-compilation-dir=/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/tools/clang/test/Driver" "-fcoverage-compilation-dir=/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/tools/clang/test/Driver" "-resource-dir" "/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/lib/clang/19" "-internal-isystem" "/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/build/stage1/lib/clang/19/include" "-ferror-limit" "19" "-fno-signed-char" "-fno-use-cxa-atexit" "-fms-extensions" "-fms-compatibility" "-fms-compatibility-version=19.33" "-fskip-odr-check-in-gmf" "-fdelayed-template-parsing" "-faddrsig" "-o" "/tmp/lit-tmp-hoegnote/cl-inputs-72e484.obj" "-x" "c" "/home/buildbots/llvm-external-buildbots/workers/ppc64le-lld-multistage-test/ppc64le-lld-multistage-test/llvm-project/clang/test/Driver/cl-inputs.c" 
       8:  "link.exe" "-out:cl-inputs.exe" "-libpath:lib" "-libpath:atlmfc/lib" "-nologo" "/tmp/lit-tmp-hoegnote/cl-inputs-72e484.obj" 
not:7                                                                                                       !~~~                        error: no match expected
>>>>>>

--

********************


```

https://github.com/llvm/llvm-project/pull/83683