[clang] [clang] Prioritze decl comments from macro expansion site (PR #65481)

[Ben Barham via cfe-commits]

bnbarham wrote:

FWIW @gribozavr the issue here is the hardcoding of the `NS_ENUM`/`NS_OPTIONS` logic, so the idea here is to make that more generic and still handle the comment inside macro case.

https://github.com/llvm/llvm-project/pull/65481