[clang-tools-extra] [clang-tidy] Stop ignoring `-std` argument in `check_clang_tidy.py` for C files (PR #150791)

[Baranov Victor via cfe-commits]

https://github.com/vbvictor commented:

Thank you for working on this.
This change is worth ReleaseNotes IMO, you could add them, we had [release notes ](https://github.com/llvm/llvm-project/blob/release/21.x/clang-tools-extra/docs/ReleaseNotes.rst#improvements-to-clang-tidy)for change in `check_clang_tidy`.

Nit: try to start PR header with "Add/Fix/Update/Make" as majority commits in LLVM (e.g. `Add -std argument in check_clang_tidy.py for C files`). It takes less time for the reviewer to understand what you did because it follows established format. In general it's good to follow [conventional commits](https://www.conventionalcommits.org/en/v1.0.0/) (but LLVM use `add` instead of `feat`).

https://github.com/llvm/llvm-project/pull/150791