[clang-tools-extra] [clang-tidy] Add 'or-earlier' suffix to check_clang_tidy.py (PR #213834)

[Zeyi Xu via cfe-commits]

https://github.com/zeyi2 approved this pull request.

LGTM, thank you!

Maybe we should also mention this in Contributing.rst?

https://github.com/llvm/llvm-project/pull/213834