feat: add support for network related flags on create, clone, and upgrade

Also add some tests to cover all the network-related functionality.

subcommands/destroy

@@ -49,6 +49,8 @@ service-destroy-cmd() {
   "$DOCKER_BIN" container run --rm -v "$SERVICE_HOST_ROOT/data:/data" -v "$SERVICE_HOST_ROOT/$PLUGIN_CONFIG_SUFFIX:/config" "$PLUGIN_BUSYBOX_IMAGE" chmod 777 -R /config /data
   rm -rf "$SERVICE_ROOT"
 
+  fn-plugin-property-destroy "$PLUGIN_COMMAND_PREFIX" "$SERVICE"
+
   plugn trigger service-action post-delete "$PLUGIN_COMMAND_PREFIX" "$SERVICE"
   dokku_log_info2 "$PLUGIN_SERVICE container deleted: $SERVICE"
 }