[clang] [clang-tools-extra] [clang-tidy] Avoid processing declarations in system headers (PR #128150)

[Gábor Horváth via cfe-commits]

Xazax-hun wrote:

This is unfortunate. I think `hasAncestor/hasParent` and co should still be able to reach nodes from system headers. We should either fix those or add an escape hatch/revert back to the old behavior/look for another approach. 

https://github.com/llvm/llvm-project/pull/128150