[clang-tools-extra] Add option to exclude headers from clang-tidy analysis (PR #91400)

[Piotr Zegar via cfe-commits]

https://github.com/PiotrZSL commented:

Missing test for ExcludeHeaderFilterRegex in .clang-tidy config file.
Would be nice to check if --dump-config work correctly with empty/not empty ExcludeHeaderFilterRegex

Except those 2 looks fine.

https://github.com/llvm/llvm-project/pull/91400