fix: Work around hanging `nc` process
This insanely ugly hack should deal with wait_for_open_port
seemingly
failing to ever return a lot of the time. This could be caused by nc
for some reason not detecting the open port, and hanging indefinitely
because it runs without a timeout by default. This ultimately results in
GitLab runners killing the test process after 3 hours, when a successful
run takes about 8 minutes.