[clang-tools-extra] [clangd] [Modules] Fixes to correctly handle module dependencies (PR #142090)

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fleeting-xx wrote:

Ok. I wasn't able to get this on a physical surface PC, but I did spin up a arm64 azure windows VM to see if I could reproduce it. Unfortunately both unit tests that were failing on the build machine passed on my VM.

My best guess maybe is a filesystem permission issue? When I tested on my VM it was an admin account so it might not have had permission issues. This could somewhat align with the error message being printed to the log if the global scan couldn't access the files for some reason.

@ChuanqiXu9 do you have any advice on how to investigate this further or know who to ping that could assist?

https://github.com/llvm/llvm-project/pull/142090