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

[Baranov Victor via cfe-commits]

vbvictor wrote:

> LGTM, thank you!
> 
> Maybe we should also mention this in Contributing.rst?

Yes seems fair, I will make next PR soon

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