[Bug 54064] ntdll:threadpool - test_tp_io() sometimes fails & crashes in Wine (GitLab CI)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=54064

--- Comment #6 from Zeb Figura  ---
Oh, well, the problem is that test_tp_multi_wait() ends up creating a very
large number of threads, and those seem to eat up the entire address space
simply from their stacks.

I'd diagnose this as a failure to actually pool, but I can get Windows to not
pool either if I let the threads take a little longer. So perhaps we should
just cut down on the number of threads we're spawning.