add action as non-operator

Author: szybia

x-pack/plugin/security/qa/operator-privileges-tests/src/javaRestTest/java/org/elasticsearch/xpack/security/operator/Constants.java

@@ -452,6 +452,7 @@ public class Constants {
         "cluster:monitor/xpack/rollup/get/caps",
         "cluster:monitor/xpack/searchable_snapshots/stats",
         "cluster:monitor/xpack/security/saml/metadata",
+        "cluster:monitor/xpack/security/stats",
         "cluster:monitor/xpack/spatial/stats",
         "cluster:monitor/xpack/sql/async/status", // org.elasticsearch.xpack.core.sql.SqlAsyncActionNames.SQL_ASYNC_GET_STATUS_ACTION_NAME
         "cluster:monitor/xpack/sql/stats/dist",