local provisioner 'useNodeNameOnly' option can be configured (#7421)

roles/kubernetes-apps/external_provisioner/local_volume_provisioner/templates/local-volume-provisioner-cm.yml.j2

@@ -21,6 +21,9 @@ data:
 {% for nodelabel in local_volume_provisioner_nodelabels %}
     - {{ nodelabel }}
 {% endfor %}
+{% endif %}
+{% if local_volume_provisioner_use_node_name_only %}
+  useNodeNameOnly: "true"
 {% endif %}
   storageClassMap: |
 {% for class_name, storage_class in local_volume_provisioner_storage_classes.items() %}