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

[Justin T. Gibbs via llvm-commits]

scsiguy wrote:

@thursond, @davidmrdavid, Thanks for the endorsement offer. I can't really predict the level of my future contributions. The work I've done in this PR series was triggered by a need for better fuzzing @work and I may not see the need to add features or fix bugs in llvm for a long time.  How does the community feel about "idle commit bits"?

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