[clang] [Clang] [Sema] Handle `this` in `__restrict`-qualified member functions properly (PR #83187)

[Aaron Ballman via cfe-commits]

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

Thank you for the fix! This seems to fix quite a few issues because it also addresses:

https://github.com/llvm/llvm-project/issues/42411
https://github.com/llvm/llvm-project/issues/18121
https://github.com/llvm/llvm-project/issues/11039

(which should be added to test cases if there's something unique there, and mentioned in the release notes and commit message).

Otherwise, LGTM!

https://github.com/llvm/llvm-project/pull/83187