[clang] [LifetimeSafety] Support allocating/freeing functions annotated `ownership_takes`/`ownership_returns` (PR #213439)

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NeKon69 wrote:

> I wonder what happens if a user-defined delete operator is annotated with these. Might be worth having some tests just to make sure the diagnostics make sense and we do not crash.

Good catch! I added test cases, along with 1 found inconsistency where `new` has a `ownership_takes` attribute.


https://github.com/llvm/llvm-project/pull/213439