[clang] [Serialization] Record whether the ODR is skipped (PR #82302)

[Chuanqi Xu via cfe-commits]

ChuanqiXu9 wrote:

The CI failure looks unrelated to this:

```
CMake Error at C:/BuildTools/Common7/IDE/CommonExtensions/Microsoft/CMake/CMake/share/cmake-3.20/Modules/CMakeDetermineCompilerId.cmake:777 (file):
--
  | file STRINGS file
  | "C:/ws/src/build/build-clang-windows/CMakeFiles/3.20.21032501-MSVC_2/CompilerIdC/CMakeCCompilerId.exe"
  | cannot be read.
  | Call Stack (most recent call first):
  | C:/BuildTools/Common7/IDE/CommonExtensions/Microsoft/CMake/CMake/share/cmake-3.20/Modules/CMakeDetermineCompilerId.cmake:11 (CMAKE_DETERMINE_COMPILER_ID_CHECK)
  | C:/BuildTools/Common7/IDE/CommonExtensions/Microsoft/CMake/CMake/share/cmake-3.20/Modules/CMakeDetermineCompilerId.cmake:58 (__determine_compiler_id_test)
  | C:/BuildTools/Common7/IDE/CommonExtensions/Microsoft/CMake/CMake/share/cmake-3.20/Modules/CMakeDetermineCCompiler.cmake:118 (CMAKE_DETERMINE_COMPILER_ID)
  | CMakeLists.txt:54 (project)
```

https://github.com/llvm/llvm-project/pull/82302