[llvm] [llvm-mt] Use XmlDeleter to free xmlFreeDoc (PR #128472)

[LLVM Continuous Integration via llvm-commits]

llvm-ci wrote:

LLVM Buildbot has detected a new failure on builder `amdgpu-offload-ubuntu-22-cmake-build-only` running on `rocm-docker-ubu-22` while building `llvm` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/203/builds/2681

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

```
Step 4 (annotate) failure: '../llvm-zorg/zorg/buildbot/builders/annotated/amdgpu-offload-cmake.py --jobs=32' (failure)
...
[754/7660] Building DiagnosticAnalysisEnums.inc...
[755/7660] Building DiagnosticASTKinds.inc...
[756/7660] Building DiagnosticASTEnums.inc...
[757/7660] Building DiagnosticCommentEnums.inc...
[758/7660] Building DiagnosticCommonKinds.inc...
[759/7660] Building DiagnosticCommentKinds.inc...
[760/7660] Building DiagnosticCrossTUKinds.inc...
[761/7660] Building DiagnosticCommonEnums.inc...
[762/7660] Building DiagnosticCrossTUEnums.inc...
[763/7660] Building CXX object lib/WindowsManifest/CMakeFiles/LLVMWindowsManifest.dir/WindowsManifestMerger.cpp.o
FAILED: lib/WindowsManifest/CMakeFiles/LLVMWindowsManifest.dir/WindowsManifestMerger.cpp.o 
ccache /usr/bin/c++ -DGTEST_HAS_RTTI=0 -DLLVM_EXPORTS -D_DEBUG -D_GLIBCXX_ASSERTIONS -D_GNU_SOURCE -D__STDC_CONSTANT_MACROS -D__STDC_FORMAT_MACROS -D__STDC_LIMIT_MACROS -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/build/lib/WindowsManifest -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/WindowsManifest -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/build/include -I/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/include -fPIC -fno-semantic-interposition -fvisibility-inlines-hidden -Werror=date-time -fno-lifetime-dse -Wall -Wextra -Wno-unused-parameter -Wwrite-strings -Wcast-qual -Wno-missing-field-initializers -pedantic -Wno-long-long -Wimplicit-fallthrough -Wno-uninitialized -Wno-nonnull -Wno-class-memaccess -Wno-redundant-move -Wno-pessimizing-move -Wno-noexcept-type -Wdelete-non-virtual-dtor -Wsuggest-override -Wno-comment -Wno-misleading-indentation -Wctad-maybe-unsupported -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -fPIC  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -std=c++17 -MD -MT lib/WindowsManifest/CMakeFiles/LLVMWindowsManifest.dir/WindowsManifestMerger.cpp.o -MF lib/WindowsManifest/CMakeFiles/LLVMWindowsManifest.dir/WindowsManifestMerger.cpp.o.d -o lib/WindowsManifest/CMakeFiles/LLVMWindowsManifest.dir/WindowsManifestMerger.cpp.o -c /home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/WindowsManifest/WindowsManifestMerger.cpp
/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/WindowsManifest/WindowsManifestMerger.cpp:679:78: error: definition of implicitly-declared ‘llvm::windows_manifest::WindowsManifestMerger::WindowsManifestMergerImpl::~WindowsManifestMergerImpl()’
  679 | WindowsManifestMerger::WindowsManifestMergerImpl::~WindowsManifestMergerImpl() {
      |                                                                              ^
/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/WindowsManifest/WindowsManifestMerger.cpp:679:1: error: ‘class llvm::windows_manifest::WindowsManifestMerger::WindowsManifestMergerImpl’ is private within this context
  679 | WindowsManifestMerger::WindowsManifestMergerImpl::~WindowsManifestMergerImpl() {
      | ^~~~~~~~~~~~~~~~~~~~~
/home/botworker/bbot/amdgpu-offload-ubuntu-22-cmake-build-only/llvm-project/llvm/lib/WindowsManifest/WindowsManifestMerger.cpp:33:30: note: declared private here
   33 | class WindowsManifestMerger::WindowsManifestMergerImpl {
      |                              ^~~~~~~~~~~~~~~~~~~~~~~~~
[764/7660] Building DiagnosticDriverKinds.inc...
[765/7660] Building DiagnosticDriverEnums.inc...
[766/7660] Building DiagnosticFrontendEnums.inc...
[767/7660] Building DiagnosticFrontendKinds.inc...
[768/7660] Building DiagnosticInstallAPIEnums.inc...
[769/7660] Building DiagnosticInstallAPIKinds.inc...
[770/7660] Building DiagnosticLexKinds.inc...
[771/7660] Building DiagnosticRefactoringEnums.inc...
[772/7660] Building DiagnosticParseKinds.inc...
[773/7660] Building DiagnosticLexEnums.inc...
[774/7660] Building DiagnosticParseEnums.inc...
[775/7660] Linking CXX executable bin/mlir-tblgen
[776/7660] Building IntrinsicsAMDGPU.h...
[777/7660] Building IntrinsicsRISCV.h...
[778/7660] Building IntrinsicsLoongArch.h...
[779/7660] Building IntrinsicEnums.inc...
[780/7660] Building IntrinsicsPowerPC.h...
[781/7660] Building IntrinsicsBPF.h...
[782/7660] Building IntrinsicsVE.h...
[783/7660] Building IntrinsicsDirectX.h...
[784/7660] Building IntrinsicsMips.h...
[785/7660] Building IntrinsicsARM.h...
[786/7660] Building IntrinsicsNVPTX.h...
[787/7660] Building IntrinsicsHexagon.h...
[788/7660] Building IntrinsicsAArch64.h...
[789/7660] Building IntrinsicsWebAssembly.h...
[790/7660] Building IntrinsicsX86.h...
[791/7660] Building IntrinsicsR600.h...

```

</details>

https://github.com/llvm/llvm-project/pull/128472