[clang] clang: fix lifetime_capture_by indexing for member functions (PR #212264)

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https://github.com/NeKon69 requested changes to this pull request.

Hey, I think that you did a lot of unnecessarily edits to the source here, so can you please cleanup the diff? Also, I suspect you used AI for this PR, if you did, then you have to add that to the description - https://llvm.org/docs/AIToolPolicy.html.

https://github.com/llvm/llvm-project/pull/212264