New deprecation warning in tests

[bewing]

  /opt/hostedtoolcache/Python/3.11.9/x64/lib/python3.11/site-packages/_pytest/python.py:166: PytestReturnNotNoneWarning: Expected None, but test/ios/test_getters.py::TestGetter::test_get_arp_table[static_arp_entry] returned [{'interface': '', 'mac': '84:B8:02:76:AC:0E', 'ip': '172.29.50.1', 'age': 8.0}, {'interface': 'Vlan20', 'mac': '00:19:07:25:34:4A', 'ip': '172.29.50.2', 'age': 221.0}, {'interface': 'Vlan20', 'mac': '00:24:F7:DD:77:41', 'ip': '172.29.50.3', 'age': -1.0}, {'interface': 'Vlan20', 'mac': '68:05:CA:12:71:C2', 'ip': '172.29.50.10', 'age': 37.0}, {'interface': 'Vlan41', 'mac': '84:B8:02:76:AC:0E', 'ip': '172.29.52.33', 'age': 61.0}, {'interface': 'Vlan41', 'mac': '00:24:F7:DD:77:43', 'ip': '172.29.52.34', 'age': -1.0}, {'interface': 'Vlan41', 'mac': 'A0:99:9B:1C:DF:A7', 'ip': '172.29.52.40', 'age': 3.0}, {'interface': 'Vlan41', 'mac': '00:24:F7:DD:77:43', 'ip': '192.168.81.34', 'age': -1.0}], which will be an error in a future version of pytest.  Did you mean to use `assert` instead of `return`?

we get a warning for every getter test ran.

[bewing]

Probably just need to update the mock_wrapper to return None