[clang-tools-extra] [clang-tidy] Skip system macros in readability-identifier-naming check (PR #132016)

[Carlos Galvez via cfe-commits]

carlosgalvezp wrote:

> We could, but also RenamerClangTidyVisitor could be improved to skip system code if not enabled.

I checked briefly and it does not seem to process system declarations already now, it was just the macros that were missing.

https://github.com/llvm/llvm-project/pull/132016