[llvm] [orc::MemoryMapper] use thread-local variant for thread-local operations (PR #154355)

[Lang Hames via llvm-commits]

lhames wrote:

I've belatedly reverted the async actions patch in https://github.com/llvm/llvm-project/pull/163480. Closing this out.

https://github.com/llvm/llvm-project/pull/154355