[clang-tools-extra] [clang-tidy] New check for static_cast of an enum class type (PR #167144)

[Yanzuo Liu via cfe-commits]

https://github.com/zwuis requested changes to this pull request.

Thank you for your patch!

If AI was used to create PR, please disclose it. And to what extent it was used.

Please finish https://github.com/llvm/llvm-project/issues/71543#issuecomment-3171781147.

https://github.com/llvm/llvm-project/pull/167144