[clang] [clang] Catch missing format attributes (PR #70024)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman commented:

Some additional comments and suggestions - you should also add a release note to clang/docs/ReleaseNotes.rst so users know about the new functionality.

https://github.com/llvm/llvm-project/pull/70024