Improve OpenShift support around security contexts

Release notes

Problem to solve

Make agentk work out of the box on OpenShift

We learned that a default OpenShift cluster requires .spec.securityContext.fsGroup, .spec.securityContext.runAsUser, .spec.securityContext.runAsGroup to be in the [1000620000, 1000629999] range

Proposal

Could an openshift kustomize layer solve this?

References

More info around security contexts in OpenShift