🍒[TSan] Fix deadlocks during TSan error reporting on Apple platforms#11303

DanBlackwell merged 2 commits intoswiftlang:stable/21.xswiftlang/llvm-project:stable/21.xfrom

DanBlackwell:cherry-pick-tsan-deadlock-fix-appleDanBlackwell/llvm-project:cherry-pick-tsan-deadlock-fix-appleCopy head branch name to clipboard