add ingress kubeapi definition for gatekeeper and kyverno

General MR

Summary

Adds ingress KubeAPI definition, which is used by Kyverno and Gatekeeper

Relevant logs/screenshots

Linked Issue

issue

Upgrade Notices

Upgrade Notices

Kyverno and Gatekeeper now are leveraging the Big Bang ingress definition for the KubeAPI CIDRs to limit ingress traffic to CIDRs specified in the definition.

To customize, override these values via Big Bang values (default is listed below):

networkPolicies:
  ingress:
    definitions:
      kubeAPI:
        from:
          - ipBlock:
              cidr: 192.168.0.0/16
          - ipBlock:
              cidr: 172.16.0.0/12
          - ipBlock:
              cidr: 10.0.0.0/8