[clang-tools-extra] New check for static_cast of an enum class type (PR #167212)

[Congcong Cai via cfe-commits]

https://github.com/HerrCai0907 commented:

please use `clang-tools-extra/clang-tidy/add_new_check.py` to create new check

https://github.com/llvm/llvm-project/pull/167212