multus-admission-controller should not run as root under Hypershift-managed CNO

Cluster Network Operator managed component multus-admission-controller does not conform to Hypershift control plane expectations.

When CNO is managed by Hypershift, multus-admission-controller must run with non-root security context. If Hypershift runs control plane on kubernetes (as opposed to Openshift) management cluster, it adds pod or container security context to most deployments with runAsUser clause inside.

In Hypershift CPO, the security context of deployment containers, including CNO, is set when it detects that SCC's are not available, see https://github.com/openshift/hypershift/blob/9d04882e2e6896d5f9e04551331ecd2129355ecd/support/config/deployment.go#L96-L100. In such a case CNO should do the same, set security context for its managed deployment multus-admission-controller to meet Hypershift standard.

Always

1.Create OCP cluster using Hypershift using Kube management cluster
2.Check pod security context of multus-admission-controller

no pod security context is set

pod security context is set with runAsUser: xxxx

This is the highest priority item from https://issues.redhat.com/browse/OCPBUGS-7942 and it needs to be fixed ASAP as it is a security issue preventing IBM from releasing Hypershift-managed Openshift service.