[llvm] [Support] Join threads when stopping the ThreadPoolExecutor (PR #166054)

[Andrew Ng via llvm-commits]

nga888 wrote:

It's not ideal, but perhaps how the threads are joined should be dependent on whether the code is being built as a DLL? That way the performance benefit I mention above would still be available for those who build LLVM statically on Windows.

https://github.com/llvm/llvm-project/pull/166054