Authorize RBAC to use `scc/privileged`

[jglick]

Otherwise OpenShift refuses to create the NFS server pod for security reasons.

Not tested directly, but it works to use the published chart after

kubectl create clusterrolebinding scc-nfs --clusterrole system:openshift:scc:privileged --serviceaccount my-namespace:the-rbac-sa-name

where the standard role is predefined

apiVersion: rbac.authorization.k8s.io/v1
kind: ClusterRole
metadata:
  name: system:openshift:scc:privileged
  ownerReferences:
  - apiVersion: config.openshift.io/v1
    kind: ClusterVersion
    name: version
    uid: …
rules:
- apiGroups:
  - security.openshift.io
  resourceNames:
  - privileged
  resources:
  - securitycontextconstraints
  verbs:
  - use

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[kvaps]

/lgtm /approve

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[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: jglick, kvaps

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