[RFE] Add source/destination pod name and namespace to the network policy audit logs

1. Proposed title of this feature request

Add source/destination pod name and namespace to the network policy audit logs.

2. What is the nature and description of the request?

It's marked as "Future work" [1] of the "Audit Loggging of Network Policy Events", which is already included in OCP [2]. This will help to better understand what network policies/ pods are seeing the most traffic.

3. Why does the customer need this? (List the business requirements here)

To better understand what network policies/ pods are seeing the most traffic.

4. List any affected packages or components.

OVN Kubernetes
Network Policy
Audit logs

[1] https://github.com/openshift/enhancements/blob/master/enhancements/network/network-policy-audit-logging.md#future-work
[2] https://docs.openshift.com/container-platform/4.12/networking/ovn_kubernetes_network_provider/logging-network-policy.html