[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 approved this pull request.

I think it looks great.
Only a few more stylistic remarks are left, but it should be already in a good shape functional-wise. I'll let you decide if you wanna apply my suggestions or not.

One more remark - this time w.r.t. the workflow. Usually, GitHub PRs prefer "merges" over "force-pushes". Whenever you force-push, all the inline remarks could get lost, as it fails to track the lines where the comments were made. Thus, when working with PRs, one usually just "merges" the tracked branch, and just builds more and more commits on top of your PR branch. Once the review is done, one is free to destroy the history and squash the commits, or do some reordering - because there are no more pending comments or remarks left.

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