[clang-tools-extra] [clang-tidy] Portability Avoid Unprototyped Functions Check (PR #161023)

[via cfe-commits]

isuckatcs wrote:

So extending the warning basically means incorporating the functionality of `-Wstrict-prototypes` into `-Wpre-c23-compat`, right? I also wonder what if we simply just preserve `-Wstrict-prototypes` for C23 as well?

@zygoloid what's your take on this, are we allowed to do any of it on the frontend?

https://github.com/llvm/llvm-project/pull/161023