[clang-tools-extra] [clangd] [C++ Modules] Skip PCH when TU imports modules (PR #187432)

[Chuanqi Xu via cfe-commits]

ChuanqiXu9 wrote:

@AaronBallman I don't think we need to discuss in other place if @ArcsinX would like to contribute his idea. @ArcsinX Sorry, I should upload that patch for you to reference but I delete it locally after I realized that I don't want to maintain that.

https://github.com/llvm/llvm-project/pull/187432