[clang-tools-extra] [clang-tidy] Fix spurious errors from builtin macros in modernize-use-trailing-return-type (PR #184022)

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vadikmironov wrote:

> LGTM after fixing the formatting issue :) Thank you!
> 
> Optional Nit: It would be nice if you could update the PR description. The current body reads as if it were (at least in part) generated by an LLM. IMHO this might be too verbose and bring in unnecessary noise (as the change in code logic is pretty straightforward). But this is a non-blocking suggestion, you can ignore this if you want.
> 
> In our AI policy:
> 
> > To ensure sufficient self review and understanding of the work, it is strongly recommended that contributors write PR descriptions themselves (if needed, using tools for translation or copy-editing).

Fine, fine 😄  While I am at it, I ventured a guess at what might have been a reason for a radical drop in incidence of this issue as a response @localspook 's comments.

https://github.com/llvm/llvm-project/pull/184022