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

[Baranov Victor via cfe-commits]

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

LGTM, but I think we should wait for a second approve for some time. It's a kind-of big change and improvement for tests.

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