This patch prepares the switch to Kubernetes 1.24.x which switches to
PSS instead of PSP. Therefore it's a good start to prepare our most
important namespaces with the relevant labels to allow Pods to use
privileged runtime features.

References:
https://kubernetes.io/docs/concepts/security/pod-security-standards/
https://v1-23.docs.kubernetes.io/docs/concepts/security/pod-security-policy/
https://v1-23.docs.kubernetes.io/docs/tasks/configure-pod-container/migrate-from-psp/