[clang] [llvm] CodeGen: Replace TargetOptions::ThreadModel with module flag (PR #223157)

[Matt Arsenault via llvm-commits]

arsenm wrote:

> If `AtomicExpand` now handles lowering atomics to non-atomic equivalents, can we drop the `LowerAtomic` pass? Maybe a follow-up?

Maybe? Maybe it's useful as a standalone utility?

https://github.com/llvm/llvm-project/pull/223157