[clang-tools-extra] [clang-tidy] Add an option to exclude files not present in the compile database (PR #120348)

[via cfe-commits]

wonbinbk wrote:

> feel free to ping me when you want to merge it.

Thank you! I just reformatted the change to make darker happy. Should be all good to merge now if you don't see anything else need to be changed.

https://github.com/llvm/llvm-project/pull/120348