[OVN] Remove OVN metadata ports from network port list

In "_check_network_internal_connectivity", all "network:" and
"compute:" ports belonging to a network are retrieved. OVN
metadata ports "network:distributed" should be filtered out because
are not a DHCP nor L3 ports.

This port type was introduced in Neutron in [1][2].

[1]https://review.opendev.org/c/openstack/neutron-lib/+/732141
[2]https://review.opendev.org/c/openstack/neutron/+/732364

Partial-Bug: #1942913
Change-Id: I7db94247c55f9ac39e3e30a4195cdcda6ed657d7
1 file changed