testing/py3-zeroconf: ifaddr is a dependency

ifaddr is a dependency for zeroconf:
https://github.com/jstasiak/python-zeroconf/blob/8e3adf8300a6f2b0bc0dcc4cde54d8890e0727e9/setup.py#L46
7 jobs for !5571 with patch/3305-testing/ifaddr-v1 in 1 minute and 29 seconds (queued for 1 second)
merge request