[clang-tools-extra] [run-clang-tidy.py] Add option to ignore source files from compilation database (PR #82416)

[Oliver Stöneberg via cfe-commits]

firewave wrote:

> Why can't we make "filter" use a full regex that supports negative expressions instead?

How do you do that? I thought `llvm::RegEx` doesn't support negative expressions.

https://github.com/llvm/llvm-project/pull/82416