This task is tracking the test case writing activities to cover the feature request described below.

Add ovn-ic-nbctl helpers for adding transit switch ports, this should allow addition for type "router" and "" (VIFs). The router port handling is already in ovn-ic, but it's based on picking up from NB database instead of getting the definition from IC NB. The vif support isn't there at all.

Mainly the VIF support has a big advantage of synchronizing the tunnel_keys for given port so it doesn't have to be done manually.

There also needs to be a change to the current logic for "router" TSP, if the port represents connection between TS and TR that ports needs to be still synchronized, just local everywhere instead of local in one AZ and remote in the rest.