[clang-tidy] Rename `cert-env33-c` to `bugprone-command-processor` (#160275)
Moves `cert-env33-c` check into `bugprone` module and gives it a clearer
name: `bugprone-command-processor`
This is part of the cleanup described in
https://github.com/llvm/llvm-project/issues/157287.
Closes https://github.com/llvm/llvm-project/issues/157288