[clang] [cindex] Add API to query the class methods of a type (PR #123539)

[Jannick Kremer via cfe-commits]

https://github.com/DeinAlptraum commented:

The Python part looks mostly good to me. I'm not too familiar with the non-Python side of things though, so would like someone else to take a look as well.
@Endilll do you want to take a look?

https://github.com/llvm/llvm-project/pull/123539