Multiple issues after running llvm-spirv test-suite with ASAN.

[bwlodarcz]

Description: ASAN reports multiple issues after running test-suite.
Steps to reproduce:

1. Clone llvm-project and go into it.
2. Clone Translator inside llvm/projects.
3. Run cmake -B build -G Ninja -DCMAKE_BUILD_TYPE=Debug -DCMAKE_EXPORT_COMPILE_COMMANDS=ON -DLLVM_ENABLE_PROJECTS=clang -DLLVM_BUILD_TESTS=ON -DLLVM_OPTIMIZED_TABLEGEN=ON -DLLVM_USE_SANITIZER='Address' -DLLVM_SPIRV_INCLUDE_TESTS=ON ./llvm.
4. Run cmake --build build and wait until build completes.
5. Go to build directory and run ninja check-llvm-spirv.

Results
Big chunk of ASAN errors and:

Failed Tests (119):
  LLVM_SPIRV :: DebugInfo/DebugInfoChecksum.ll
  LLVM_SPIRV :: DebugInfo/DebugInfoChecksumCompileUnit.ll
  LLVM_SPIRV :: DebugInfo/DebugInfoLLVMArg.ll
  LLVM_SPIRV :: DebugInfo/DebugInfoTypeBasic.ll
  LLVM_SPIRV :: DebugInfo/DebugInfoTypeInheritance.ll
  LLVM_SPIRV :: DebugInfo/Generic/inlined-locations.ll
  LLVM_SPIRV :: DebugInfo/NonSemantic/DIImportedEntity.ll
  ...TRUNCATED...
  LLVM_SPIRV :: transcoding/OpGroupAllAny.ll
  LLVM_SPIRV :: transcoding/image_signedness.ll
  LLVM_SPIRV :: transcoding/sub_group_ballot.ll
  LLVM_SPIRV :: transcoding/sub_group_clustered_reduce.ll
  LLVM_SPIRV :: transcoding/sub_group_non_uniform_arithmetic.ll
  LLVM_SPIRV :: transcoding/sub_group_non_uniform_vote.ll


Testing Time: 21.15s

Total Discovered Tests: 751
  Passed           : 628 (83.62%)
  Expectedly Failed:   4 (0.53%)
  Failed           : 119 (15.85%)

Full text file from run:
llvm-spirv-asan.txt

[bwlodarcz]

As all of the issues are fixed this can be closed now.