[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-rhel-8-cmake-build-only` running on `rocm-docker-rhel-8` while building `llvm` at step 4 "annotate".

Full details are available at: https://lab.llvm.org/buildbot/#/builders/204/builds/1491

<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)
...
[711/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/LLVMIRConversionGen.cpp.o
[712/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/mlir-tblgen.cpp.o
[713/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/OmpOpGen.cpp.o
[714/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/OpClass.cpp.o
[715/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/OpDefinitionsGen.cpp.o
[716/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/OpDocGen.cpp.o
[717/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/OpInterfacesGen.cpp.o
[718/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/OpPythonBindingGen.cpp.o
[719/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/PassDocGen.cpp.o
[720/7660] 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-rhel-8-cmake-build-only/build/lib/WindowsManifest -I/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/llvm/lib/WindowsManifest -I/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/build/include -I/home/botworker/bbot/amdgpu-offload-rhel-8-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-noexcept-type -Wdelete-non-virtual-dtor -Wno-comment -Wno-misleading-indentation -fdiagnostics-color -ffunction-sections -fdata-sections -O3 -DNDEBUG -std=c++17 -fPIC  -fno-exceptions -funwind-tables -fno-rtti -UNDEBUG -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-rhel-8-cmake-build-only/llvm-project/llvm/lib/WindowsManifest/WindowsManifestMerger.cpp
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/llvm/lib/WindowsManifest/WindowsManifestMerger.cpp:679:78: error: definition of implicitly-declared ‘llvm::windows_manifest::WindowsManifestMerger::WindowsManifestMergerImpl::~WindowsManifestMergerImpl()’
 WindowsManifestMerger::WindowsManifestMergerImpl::~WindowsManifestMergerImpl() {
                                                                              ^
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/llvm/lib/WindowsManifest/WindowsManifestMerger.cpp:679:1: error: ‘class llvm::windows_manifest::WindowsManifestMerger::WindowsManifestMergerImpl’ is private within this context
 WindowsManifestMerger::WindowsManifestMergerImpl::~WindowsManifestMergerImpl() {
 ^~~~~~~~~~~~~~~~~~~~~
/home/botworker/bbot/amdgpu-offload-rhel-8-cmake-build-only/llvm-project/llvm/lib/WindowsManifest/WindowsManifestMerger.cpp:33:30: note: declared private here
 class WindowsManifestMerger::WindowsManifestMergerImpl {
                              ^~~~~~~~~~~~~~~~~~~~~~~~~
[721/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/LLVMIRIntrinsicGen.cpp.o
[722/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/OpFormatGen.cpp.o
[723/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/OpGenHelpers.cpp.o
[724/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/PassCAPIGen.cpp.o
[725/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/PassGen.cpp.o
[726/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/RewriterGen.cpp.o
[727/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/BytecodeDialectGen.cpp.o
[728/7660] Building CXX object tools/mlir/tools/mlir-tblgen/CMakeFiles/mlir-tblgen.dir/AttrOrTypeDefGen.cpp.o
[729/7660] Building AttrImpl.inc...
[730/7660] Building AttrTextNodeDump.inc...
[731/7660] Building AttrNodeTraverse.inc...
[732/7660] Building AttrVisitor.inc...
[733/7660] Building StmtNodes.inc...
[734/7660] Building DeclNodes.inc...
[735/7660] Building TypeNodes.inc...
[736/7660] Building AbstractBasicReader.inc...
[737/7660] Building AbstractBasicWriter.inc...
[738/7660] Building AbstractTypeReader.inc...
[739/7660] Building AbstractTypeWriter.inc...
[740/7660] Building CommentNodes.inc...
[741/7660] Building Attrs.inc...
[742/7660] Building CommentHTMLTags.inc...
[743/7660] Building CommentHTMLTagsProperties.inc...
[744/7660] Building CommentHTMLNamedCharacterReferences.inc...
[745/7660] Building CommentCommandInfo.inc...
[746/7660] Building CommentCommandList.inc...
[747/7660] Building StmtDataCollectors.inc...
[748/7660] Building DiagnosticRefactoringKinds.inc...

```

</details>

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