Make NotEntitledException inherit from SecurityException for compatibility purposes (elastic#123984) (elastic#124008)

Author: ldematte

libs/entitlement/src/main/java/org/elasticsearch/entitlement/runtime/api/NotEntitledException.java

@@ -9,7 +9,7 @@
 
 package org.elasticsearch.entitlement.runtime.api;
 
-public class NotEntitledException extends RuntimeException {
+public class NotEntitledException extends SecurityException {
     public NotEntitledException(String message) {
         super(message);
     }