VS2022 bots are failing, spuriously?

[dneto0]

Description
The VS2022 debug and releases CI bots are failing

Steps to Reproduce

• Any PR within the last two days fails. I think this will happen with a no-change commit.

Example: the latest commit on main is 8408ae8
It fails the Windows bots using VS2022
https://github.com/microsoft/DirectXShaderCompiler/runs/25879024728

The debug build fails with a compile error:

2024-06-06T06:24:48.6665848Z D:\a\1\s\projects\dxilconv\include\ShaderBinary\ShaderBinary.h(381,10): error C2220: the following warning is treated as an error [D:\a\1\projects\dxilconv\lib\ShaderBinary\ShaderBinary.vcxproj]
2024-06-06T06:24:48.7758196Z D:\a\1\s\projects\dxilconv\include\ShaderBinary\ShaderBinary.h(381,10): warning C4201: nonstandard extension used: nameless struct/union [D:\a\1\projects\dxilconv\lib\ShaderBinary\ShaderBinary.vcxproj]

That seems wrong because the code is explicitly guarded with a pragma to disable that warning.

The release build has a mysterious error message:

C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Microsoft\VC\v170\Microsoft.CppCommon.targets(254,5): error MSB8066: Custom build for 'D:\a\1\CMakeFiles\c010341e1c4c2694685d486ffd93ffcb\StmtNodes.inc.tmp.rule;D:\a\1\CMakeFiles\c010341e1c4c2694685d486ffd93ffcb\StmtNodes.inc.rule;D:\a\1\CMakeFiles\e1327880013738d1b2f92ba750fb28de\ClangStmtNodes.rule;D:\a\1\s\tools\clang\include\clang\AST\CMakeLists.txt' exited with code -1073741819. [D:\a\1\tools\clang\include\clang\AST\ClangStmtNodes.vcxproj]

Is it being killed with the debug build fails?

[dneto0]

I noticed because it's affecting #6668 and #6673

[llvm-beanz]

The Windows build failures here seem to be related to a VM image update that occurred last night. Our builds work fine on VM image 20240514.3.0, and fail on 20240603.1.0.

[llvm-beanz]

I've filed an issue on the VM image: actions/runner-images#10004