[clang-tools-extra] [clangd] fix extract-to-function for overloaded operators (PR #81640)

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BenBlumer wrote:

@5chmidti I'm excited for this to be mainlined. Give me a thumbs up if you want me to fix the typo and rebase for you -- happy to do it this weekend. 

https://github.com/llvm/llvm-project/pull/81640