[clang] [llvm] Remove GtestMatchers and GtestMatchersTest (PR #162524)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `sanitizer-ppc64le-linux` running on `ppc64le-sanitizer` while building `clang,llvm` at step 2 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/72/builds/15404

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

```
Step 2 (annotate) failure: 'python ../sanitizer_buildbot/sanitizers/zorg/buildbot/builders/sanitizers/buildbot_selector.py' (failure)
...
-- Performing Test C_WCOMMENT_ALLOWS_LINE_WRAP
-- Performing Test C_WCOMMENT_ALLOWS_LINE_WRAP - Success
-- Performing Test C_SUPPORTS_MISLEADING_INDENTATION_FLAG
-- Performing Test C_SUPPORTS_MISLEADING_INDENTATION_FLAG - Success
-- Performing Test CXX_SUPPORTS_MISLEADING_INDENTATION_FLAG
-- Performing Test CXX_SUPPORTS_MISLEADING_INDENTATION_FLAG - Success
-- Performing Test C_SUPPORTS_CTAD_MAYBE_UNSPPORTED_FLAG
-- Performing Test C_SUPPORTS_CTAD_MAYBE_UNSPPORTED_FLAG - Success
-- Performing Test CXX_SUPPORTS_CTAD_MAYBE_UNSPPORTED_FLAG
-- Performing Test CXX_SUPPORTS_CTAD_MAYBE_UNSPPORTED_FLAG - Success
-- Performing Test C_SUPPORTS_NO_PASS_FAILED_FLAG
-- Performing Test C_SUPPORTS_NO_PASS_FAILED_FLAG - Success
-- Performing Test CXX_SUPPORTS_NO_PASS_FAILED_FLAG
-- Performing Test CXX_SUPPORTS_NO_PASS_FAILED_FLAG - Success
-- Performing Test LINKER_SUPPORTS_COLOR_DIAGNOSTICS
-- Performing Test LINKER_SUPPORTS_COLOR_DIAGNOSTICS - Success
-- Looking for os_signpost_interval_begin
-- Looking for os_signpost_interval_begin - not found
-- Looking for flock
-- Looking for flock - found
-- Linker detection: LLD
-- Performing Test LLVM_LINKER_SUPPORTS_B_SYMBOLIC_FUNCTIONS
-- Performing Test LLVM_LINKER_SUPPORTS_B_SYMBOLIC_FUNCTIONS - Success
-- Performing Test HAS_WERROR_GLOBAL_CTORS
-- Performing Test HAS_WERROR_GLOBAL_CTORS - Success
-- Performing Test LLVM_HAS_NOGLOBAL_CTOR_MUTEX
-- Performing Test LLVM_HAS_NOGLOBAL_CTOR_MUTEX - Success
-- Looking for __x86_64__
-- Looking for __x86_64__ - not found
-- Found Git: /usr/bin/git (found version "2.43.5")
-- Looking for logf128
-- Looking for logf128 - not found
-- Targeting PowerPC
-- LLD version: 22.0.0
-- Looking for sys/resource.h
-- Looking for sys/resource.h - found
-- Looking for dlfcn.h
-- Looking for dlfcn.h - found
-- Looking for dladdr
-- Looking for dladdr - found
-- Clang version: 22.0.0git
-- Looking for include file sys/inotify.h
-- Looking for include file sys/inotify.h - found
-- Performing Test HAVE_LINKER_FLAG_LONG_PLT
-- Performing Test HAVE_LINKER_FLAG_LONG_PLT - Success
-- Found Perl: /usr/bin/perl (found version "5.26.3")
-- Found Python3: /home/buildbots/llvm-external-buildbots/workers/env/bin/python3.8 (found version "3.8.17") found components: Interpreter
-- Not building llvm-mt because libxml2 is not available
-- Registering ExampleIRTransforms as a pass plugin (static build: OFF)
Step 12 (test compiler-rt default) failure: test compiler-rt default (failure)
...
-- Performing Test C_WCOMMENT_ALLOWS_LINE_WRAP
-- Performing Test C_WCOMMENT_ALLOWS_LINE_WRAP - Success
-- Performing Test C_SUPPORTS_MISLEADING_INDENTATION_FLAG
-- Performing Test C_SUPPORTS_MISLEADING_INDENTATION_FLAG - Success
-- Performing Test CXX_SUPPORTS_MISLEADING_INDENTATION_FLAG
-- Performing Test CXX_SUPPORTS_MISLEADING_INDENTATION_FLAG - Success
-- Performing Test C_SUPPORTS_CTAD_MAYBE_UNSPPORTED_FLAG
-- Performing Test C_SUPPORTS_CTAD_MAYBE_UNSPPORTED_FLAG - Success
-- Performing Test CXX_SUPPORTS_CTAD_MAYBE_UNSPPORTED_FLAG
-- Performing Test CXX_SUPPORTS_CTAD_MAYBE_UNSPPORTED_FLAG - Success
-- Performing Test C_SUPPORTS_NO_PASS_FAILED_FLAG
-- Performing Test C_SUPPORTS_NO_PASS_FAILED_FLAG - Success
-- Performing Test CXX_SUPPORTS_NO_PASS_FAILED_FLAG
-- Performing Test CXX_SUPPORTS_NO_PASS_FAILED_FLAG - Success
-- Performing Test LINKER_SUPPORTS_COLOR_DIAGNOSTICS
-- Performing Test LINKER_SUPPORTS_COLOR_DIAGNOSTICS - Failed
-- Looking for os_signpost_interval_begin
-- Looking for os_signpost_interval_begin - not found
-- Looking for flock
-- Looking for flock - found
-- Found Python3: /home/buildbots/llvm-external-buildbots/workers/env/bin/python3.8 (found version "3.8.17") found components: Interpreter
-- LLVM host triple: powerpc64le-unknown-linux-gnu
-- LLVM default target triple: powerpc64le-unknown-linux-gnu
-- Using libc++abi testing configuration: /home/buildbots/llvm-external-buildbots/workers/ppc64le-sanitizer/sanitizer-ppc64le/build/llvm-project/libcxxabi/test/configs/llvm-libc++abi-static.cfg.in
-- Looking for fopen in c
-- Looking for fopen in c - found
-- Looking for __gcc_personality_v0 in gcc_s
-- Looking for __gcc_personality_v0 in gcc_s - found
-- Looking for __aeabi_uldivmod in gcc
-- Looking for __aeabi_uldivmod in gcc - found
-- Performing Test C_SUPPORTS_COMMENT_LIB_PRAGMA
-- Performing Test C_SUPPORTS_COMMENT_LIB_PRAGMA - Success
-- Looking for dladdr in dl
-- Looking for dladdr in dl - found
-- Looking for __cxa_thread_atexit_impl in c
-- Looking for __cxa_thread_atexit_impl in c - found
-- Performing Test CXX_SUPPORTS_FSTRICT_ALIASING_FLAG
-- Performing Test CXX_SUPPORTS_FSTRICT_ALIASING_FLAG - Success
-- Performing Test CXX_SUPPORTS_EHSC_FLAG
-- Performing Test CXX_SUPPORTS_EHSC_FLAG - Failed
-- Performing Test C_SUPPORTS_FUNWIND_TABLES_FLAG
-- Performing Test C_SUPPORTS_FUNWIND_TABLES_FLAG - Success
-- Performing Test CXX_SUPPORTS_WALL_FLAG
-- Performing Test CXX_SUPPORTS_WALL_FLAG - Success
-- Performing Test CXX_SUPPORTS_WEXTRA_FLAG
-- Performing Test CXX_SUPPORTS_WEXTRA_FLAG - Success
-- Performing Test CXX_SUPPORTS_WNEWLINE_EOF_FLAG
-- Performing Test CXX_SUPPORTS_WNEWLINE_EOF_FLAG - Success
-- Performing Test CXX_SUPPORTS_WSHADOW_FLAG

```

</details>

https://github.com/llvm/llvm-project/pull/162524