This builds on top of https://issues.redhat.com/browse/SDN-4937

Goal of this card is to implement the services workflow for user-defined networks - in-cluster traffic flows only (external->svc is tracked in another card)

• Check Services aspect in the KEP
• add logic to ensure services are accessible on the user-defined network
• How will the endpointslices for user-defined networks be designed as? Will it be a new representation? new eps controller extended from core kube that will create eps-es on ovnk's behalf and do the healthchecks? runtime lookup of VIP->user-defined-network-podIP?
• accordingly for services create LBs on switches and routers for the secondary network topology
• extend current services controller to be multiple networks aware
• add tests for all combos here
• pod->services code is same for both gateway modes, so ensure it works on both

End goal here is: Only add support for east-west pod->services logic on user-defined network for the pods. Other things will have other cards. Please work with other assignee as a "services-design-sub-group" so that you also have your potential reviewer in your group.

TL;DR: traffic flows that should be supported here:

1. pod->clusterip (w & w/ITP=local)
2. pod->loadbalancerVIP (w & w/ ETP=local)
3. pod->externalIP
4. pod->nodePort -> sameNode/otherNode