Goal

Allow administrators to create new Network Attachment Definitions for OVN Kubernetes secondary localnet networks.

Non-Requirements

• <List of things not included in this epic, to alleviate any doubt raised during the grooming process.>

Notes

• This should be a new item in the dropdown menu of NetworkAttachmentDefinition dialog. When selecting "OVN Kubernetes secondary localnet network" two additional fields should show up: "Bridge mapping", MTU (optional) and "VLAN (optional)". The "Bridge mapping" attribute should have a tooltip explaining what it is. That should render into:

apiVersion: k8s.cni.cncf.io/v1
kind: NetworkAttachmentDefinition
metadata:
  name: <name>
  namespace: <namespace>
spec:
  config: |2
    {
            "cniVersion": "0.4.0",
            "name": "<bridge mapping>",
            "type": "ovn-k8s-cni-overlay",
            "topology":"localnet",
            "vlanID": <VLAN>, # set only if passed from the user
            "mtu": <MTU>, # set only if passed from the user
            "netAttachDefName": "<namespace>/<name>"
    } 

• Tooltip text: "Reference to a physical network name. A bridge mapping must be configured on cluster nodes to map between physical network names and Open vSwitch bridges."
• Draft of the localnet documentation https://github.com/openshift/openshift-docs/blob/0fe4ec0bcc31afd4ba5060fb87dc9c347da34603/modules/configuring-localnet-switched-topology.adoc#L92

Done Checklist

• DEV - Upstream code and tests merged: https://github.com/openshift/console/pull/13293
• QE - Test plan: https://polarion.engineering.redhat.com/polarion/#/project/CNV/workitem?id=CNV-10548
• QE - Test automation: https://gitlab.cee.redhat.com/cnv-qe/kubevirt-ui/-/merge_requests/539