[clang-tools-extra] [clang] [clang] Extend diagnose_if to accept more detailed warning information (PR #70976)

[Erich Keane via cfe-commits]

https://github.com/erichkeane commented:

I like this!  I can't really review the tidy stuff immediately, but I think this really makes sense.  You DO have some unrelated WS changes that should be removed though.

Also, Most of the changes this causes along the way I think are vast improvements.

https://github.com/llvm/llvm-project/pull/70976