[compiler-rt] [compiler-rt][ASan] Add function copying annotations (PR #91702)

[via llvm-commits]

AdvenamTacet wrote:

This PR is ready for the review. I see nothing more what has to be done in it.

Next step (but it may be in a separate PR) is adding a function like `asan_unsafe_memmove`, which would be a `memmove` with turned off instrumentation (to not trigger ASan error). I'm unsure in which file we should add the function and I'm open to suggestions. Optionally we can create `asan_unsafe_memmove_with_annotations` (to copy content and annotations in one call).

https://github.com/llvm/llvm-project/pull/91702