[compiler-rt] [sanitizer_common] Add operator new chain-handling framework (PR #201151)

[David Justo via llvm-commits]

https://github.com/davidmrdavid commented:

This mostly LGTM, but the comments seem a bit verbose. I left feedback to keep the file easy to digest.

Also left a question regarding the scope of these helpers.

https://github.com/llvm/llvm-project/pull/201151