[compiler-rt] [RTSan][Darwin] Adjust OSSpinLock/_os_nospin_lock interceptor and tests (PR #132867)

[via llvm-commits]

davidtrevelyan wrote:

Many thanks for your efforts here @thetruestblue - this LGTM. I'll merge this when I have a bit of time ahead of me to handle any updates if necessary after merge. If @cjappl is happy to handle this - I'm happy for this to be merged as soon as he's ready 👍 

https://github.com/llvm/llvm-project/pull/132867