[clang] [Clang] Resolve FIXME: Use class method when receiver is reference to class (PR #206378)

[Balázs Benics via cfe-commits]

steakhal wrote:

Hi there, thank you for contributing!
I wonder why did you pick this FIXME? Is there any particular motivation behind this PR?
I also wonder what's behind the branch name backing this PR?
Finally, did you use AI for making this contribution?

https://github.com/llvm/llvm-project/pull/206378