[clang] [clang-tools-extra] [clang-tidy] [Modules] Skip checking decls in clang-tidy (PR #145630)

[Balazs Benics via cfe-commits]

https://github.com/steakhal commented:

I also believe that the nodes from modules should not be traversed by default, but there should be an option to allow traversing those - just like it's implemented.

https://github.com/llvm/llvm-project/pull/145630