Windows tests occassionally hang for more than an hour
Seen here:
- https://gitlab.com/inko-lang/inko/-/jobs/3051720326
- https://gitlab.com/inko-lang/inko/-/jobs/3056751289
I'm guessing the new scheduler isn't shutting down properly in certain cases, causing tests that use sub processes to hang. Another possibility is that when backup threads go to sleep they still have work that isn't pushed away, though I think that should already be taken care of.