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

[Justin Cady via cfe-commits]

justincady wrote:

@Baiyi27 Could you please file an issue as opposed to adding it as a comment here? It may or may not be related to this original change, and separating it out into its own discussion would be helpful. Thanks!

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