[compiler-rt] [TSAN] Add __tsan_check_no_mutexes_held helper (PR #69372)

[Dmitry Vyukov via llvm-commits]

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@@ -126,6 +126,10 @@ void __tsan_mutex_post_signal(void *addr, unsigned flags);
 void __tsan_mutex_pre_divert(void *addr, unsigned flags);
 void __tsan_mutex_post_divert(void *addr, unsigned flags);
 
+// Annotate that no mutexes can be held. If we are holding mutexes, then
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dvyukov wrote:

This is effectively not an annotation, but a check. So I would say something along the following lines:

```
// Check that the current thread does not hold any mutexes,
// report a bug report otherwise.
```

https://github.com/llvm/llvm-project/pull/69372