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

[Nathan Ridge via cfe-commits]

HighCommander4 wrote:

Buildkite is showing the test `Clang :: Index/comment-to-html-xml-conversion.cpp` failing. Will investigate.

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