Remove PodSecurityPolicy support and references (#10723)

docs/hardening.md

docs/vars.md

inventory/sample/group_vars/k8s_cluster/k8s-cluster.yml

roles/kubernetes-apps/ansible/defaults/main.yml

roles/kubernetes-apps/ansible/tasks/netchecker.yml

...ble/templates/netchecker-agent-hostnet-clusterrole.yml.j2

...plates/netchecker-agent-hostnet-clusterrolebinding.yml.j2

...pps/ansible/templates/netchecker-agent-hostnet-psp.yml.j2

roles/kubernetes-apps/cluster_roles/defaults/main.yml

...-apps/csi_driver/gcp_pd/templates/gcp-pd-csi-setup.yml.j2

...ps/external_provisioner/cephfs_provisioner/tasks/main.yml

...ovisioner/templates/clusterrole-cephfs-provisioner.yml.j2

...ephfs_provisioner/templates/psp-cephfs-provisioner.yml.j2

...-apps/external_provisioner/rbd_provisioner/tasks/main.yml

..._provisioner/templates/clusterrole-rbd-provisioner.yml.j2

...oner/rbd_provisioner/templates/psp-rbd-provisioner.yml.j2

roles/kubernetes-apps/metallb/tasks/main.yml

roles/kubernetes-apps/metallb/templates/metallb.yaml.j2

roles/kubernetes-apps/registry/tasks/main.yml

roles/kubernetes-apps/registry/templates/registry-cr.yml.j2