security: add example NetworkPolicy CRs for Ceph operand pods

Add a single example YAML with NetworkPolicy definitions
for all Ceph operand pods (mon, osd, mgr, mds, exporter,
osd-prepare, crashcollector, tools).
Users can apply these policies to restrict egress/ingress
traffic for Rook-Ceph daemon pods.

Signed-off-by: Oded Viner <oviner@redhat.com>

tests/scripts/github-action-helper.sh

@@ -350,6 +350,7 @@ function replace_ceph_image() {
 function deploy_cluster() {
   cd "${REPO_DIR}/deploy/examples"
 
+  kubectl create -f networkpolicy.yaml
   deploy_manifest_with_local_build operator.yaml
 
   if [ $# == 0 ]; then