[clang] [Frontend][PCH]-Add support for ignoring PCH options (-ignore-pch). (PR #142409)

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MaggieYingYi wrote:

Thanks @mizvekov  for your quick code review. I got a `Test Doc build` failure https://github.com/llvm/llvm-project/actions/runs/15397135588. Following the build steps, I managed to reproduce the error, but I am not sure how to fix it. Is there any command to format *.rst file? or any suggestion? 
Thanks 

https://github.com/llvm/llvm-project/pull/142409