[clang] [lldb] [Clang] Improve Sema diagnostic performance for __builtin_counted_by_ref (PR #116719)

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

The changes seem fine to me now; not sure we’re handling this in all places where it needs to be handled though. I’d say maybe wait a day or two before merging in case anyone else wants to comment on that.

https://github.com/llvm/llvm-project/pull/116719