[clang] [Clang SA]: add support for mismatched ownership_returns+ownership_takes calls for custom allocation classes (PR #98941)

[Balazs Benics via cfe-commits]

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

Looks pretty good. Thanks for working on the issue.
I didn't see any major blocking issue with the PR, so good job on that!

Overall, be sure to follow the llvm [coding style](https://llvm.org/docs/CodingStandards.html#name-types-functions-variables-and-enumerators-properly), including using upper case variable names.

Thanks again for working on this :)

https://github.com/llvm/llvm-project/pull/98941