[clang] [AST] Iterate redecls starting from the canonical one in getRawCommentsForAnyRedecl() (PR #108475)

[Aaron Ballman via cfe-commits]

https://github.com/AaronBallman commented:

Thanks for the fix! The changes should also come with a release note so users know about the improvement. Otherwise, changes basically LG modulo nits.

https://github.com/llvm/llvm-project/pull/108475