[compiler-rt] [asan] Plumb may_return_null through Allocator::Allocate/asan_memalign (PR #196413)

[David Justo via llvm-commits]

davidmrdavid wrote:

Thank you. I'll explicitly linking it now (like so #196388) so they're connected.
Would be great to include a similar link in the PR description, so that it makes it in the merge commit.

https://github.com/llvm/llvm-project/pull/196413