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

[Victor Chernyakin via cfe-commits]

https://github.com/localspook approved this pull request.

I would be curious to know what caused the unreduced repro in the original issue to stop reproducing, even though this problem hadn't been fixed directly (as shown by the reduced repro here).

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