[compiler-rt] [sanitizer] Fix asserts in asan and tsan in pthread interceptors. (PR #75394)

[Dmitry Vyukov via llvm-commits]

dvyukov wrote:

Yes, I wonder what's the pattern in user code that triggers this and is not a bug.
Error codes are frequently ignored.
Perhaps print a better explanatory message before crashing.

https://github.com/llvm/llvm-project/pull/75394