[clang] [llvm] RuntimeLibcalls: Move VectorLibrary handling into TargetOptions (PR #167996)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clang-armv8-quick` running on `linaro-clang-armv8-quick` while building `clang,cross-project-tests,llvm` at step 4 "build stage 1".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/154/builds/24071

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

```
Step 4 (build stage 1) failure: 'ninja' (failure)
...
[4187/4235] Linking CXX executable bin/clang-sycl-linker
[4188/4235] Building CXX object tools/clang/tools/clang-nvlink-wrapper/CMakeFiles/clang-nvlink-wrapper.dir/ClangNVLinkWrapper.cpp.o
[4189/4235] Building CXX object tools/clang/tools/clang-repl/CMakeFiles/clang-repl.dir/ClangRepl.cpp.o
[4190/4235] Building CXX object tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/deltas/RunIRPasses.cpp.o
[4191/4235] Building CXX object tools/clang/tools/c-index-test/CMakeFiles/c-index-test.dir/core_main.cpp.o
[4192/4235] Linking CXX executable bin/llvm-split
[4193/4235] Linking CXX executable bin/clang-refactor
[4194/4235] Building CXX object tools/llvm-exegesis/CMakeFiles/llvm-exegesis.dir/llvm-exegesis.cpp.o
[4195/4235] Building CXX object tools/llvm-lto2/CMakeFiles/llvm-lto2.dir/llvm-lto2.cpp.o
[4196/4235] Building CXX object tools/opt/CMakeFiles/LLVMOptDriver.dir/optdriver.cpp.o
FAILED: tools/opt/CMakeFiles/LLVMOptDriver.dir/optdriver.cpp.o 
/usr/local/bin/c++ -DGTEST_HAS_RTTI=0 -D_DEBUG -D_FILE_OFFSET_BITS=64 -D_GLIBCXX_ASSERTIONS -D_GLIBCXX_USE_CXX11_ABI=1 -D_GNU_SOURCE -D_LARGEFILE_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/tcwg-buildbot/worker/clang-armv8-quick/stage1/tools/opt -I/home/tcwg-buildbot/worker/clang-armv8-quick/llvm/llvm/tools/opt -I/home/tcwg-buildbot/worker/clang-armv8-quick/stage1/include -I/home/tcwg-buildbot/worker/clang-armv8-quick/llvm/llvm/include -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 -Wno-pass-failed -Wmisleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -MD -MT tools/opt/CMakeFiles/LLVMOptDriver.dir/optdriver.cpp.o -MF tools/opt/CMakeFiles/LLVMOptDriver.dir/optdriver.cpp.o.d -o tools/opt/CMakeFiles/LLVMOptDriver.dir/optdriver.cpp.o -c /home/tcwg-buildbot/worker/clang-armv8-quick/llvm/llvm/tools/opt/optdriver.cpp
../llvm/llvm/tools/opt/optdriver.cpp:684:30: error: redefinition of 'RTLCI'
  684 |   RTLIB::RuntimeLibcallsInfo RTLCI(ModuleTriple, codegen::getExceptionModel(),
      |                              ^
../llvm/llvm/tools/opt/optdriver.cpp:677:30: note: previous definition is here
  677 |   RTLIB::RuntimeLibcallsInfo RTLCI(ModuleTriple, codegen::getExceptionModel(),
      |                              ^
1 error generated.
[4197/4235] Building CXX object tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/WebKit/ForwardDeclChecker.cpp.o
[4198/4235] Building CXX object tools/clang/lib/StaticAnalyzer/Checkers/CMakeFiles/obj.clangStaticAnalyzerCheckers.dir/WebKit/RetainPtrCtorAdoptChecker.cpp.o
[4199/4235] Building CXX object tools/clang/tools/clang-linker-wrapper/CMakeFiles/clang-linker-wrapper.dir/ClangLinkerWrapper.cpp.o
[4200/4235] Building CXX object tools/llvm-exegesis/lib/CMakeFiles/LLVMExegesis.dir/Assembler.cpp.o
[4201/4235] Linking CXX executable bin/lli
[4202/4235] Linking CXX executable bin/llvm-opt-fuzzer
[4203/4235] Linking CXX executable bin/clang-installapi
[4204/4235] Linking CXX executable bin/clang-nvlink-wrapper
[4205/4235] Building CXX object tools/llvm-reduce/CMakeFiles/llvm-reduce.dir/ReducerWorkItem.cpp.o
[4206/4235] Building CXX object tools/clang/tools/clang-scan-deps/CMakeFiles/clang-scan-deps.dir/ClangScanDeps.cpp.o
[4207/4235] Linking CXX executable bin/llc
[4208/4235] Building CXX object tools/opt/CMakeFiles/LLVMOptDriver.dir/NewPMDriver.cpp.o
[4209/4235] Linking CXX executable bin/llvm-lto2
[4210/4235] Building CXX object tools/llvm-jitlink/CMakeFiles/llvm-jitlink.dir/llvm-jitlink.cpp.o
[4211/4235] Building CXX object tools/clang/tools/libclang/CMakeFiles/libclang.dir/CXExtractAPI.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/167996