[llvm] [IR] Deprecate PointerType::get/getUnqual pointee type overload (PR #134517)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `clangd-ubuntu-tsan` running on `clangd-ubuntu-clang` while building `llvm` at step 5 "build-clangd-clangd-index-server-clangd-indexer".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/134/builds/16395

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

```
Step 5 (build-clangd-clangd-index-server-clangd-indexer) failure: build (failure)
0.006 [3237/18/1] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangleNodes.cpp.o
FAILED: lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangleNodes.cpp.o 
ccache /usr/bin/clang++ -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/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/lib/Demangle -I/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/llvm/lib/Demangle -I/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/include -I/vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/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 -Wmisleading-indentation -Wctad-maybe-unsupported -fno-omit-frame-pointer -gline-tables-only -fsanitize=thread -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangleNodes.cpp.o -MF lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangleNodes.cpp.o.d -o lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangleNodes.cpp.o -c /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/llvm-project/llvm/lib/Demangle/MicrosoftDemangleNodes.cpp
ccache: error: /vol/ccache/ccache.conf: No such file or directory
0.009 [3237/17/2] Creating /vol/worker/clangd-ubuntu-clang/clangd-ubuntu-tsan/build/NATIVE...
1.058 [3237/16/3] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AArch64BuildAttributes.cpp.o
1.187 [3237/15/4] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/IntEqClasses.cpp.o
1.253 [3237/14/5] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/InstructionCost.cpp.o
1.254 [3237/13/6] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ARMBuildAttributes.cpp.o
1.387 [3237/12/7] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/IntervalMap.cpp.o
1.391 [3237/11/8] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AArch64AttributeParser.cpp.o
1.498 [3237/10/9] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APSInt.cpp.o
1.545 [3237/9/10] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/RustDemangle.cpp.o
1.619 [3237/8/11] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/InitLLVM.cpp.o
2.068 [3237/7/12] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFixedPoint.cpp.o
2.376 [3237/6/13] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/MicrosoftDemangle.cpp.o
2.567 [3237/5/14] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/AMDGPUMetadata.cpp.o
2.680 [3237/4/15] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/ARMAttributeParser.cpp.o
4.087 [3237/3/16] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APInt.cpp.o
4.371 [3237/2/17] Building CXX object lib/Support/CMakeFiles/LLVMSupport.dir/APFloat.cpp.o
5.471 [3237/1/18] Building CXX object lib/Demangle/CMakeFiles/LLVMDemangle.dir/ItaniumDemangle.cpp.o
ninja: build stopped: subcommand failed.

```

</details>

https://github.com/llvm/llvm-project/pull/134517