[clang-tools-extra] readability-identifier-naming should add universal default options (PR #171686)

[Yanzuo Liu via cfe-commits]

zwuis wrote:

"check_clang_tidy.py" is not designed to run tests directly. Use `llvm-lit identifier-naming-default-lower.cpp`. The "llvm-lit" is in "_your-llvm-build-path_/bin". See <https://llvm.org/docs/CommandGuide/lit.html>.

https://github.com/llvm/llvm-project/pull/171686