Include stack trace in Not Entitled warning (elastic#124895) (elastic#124915)

* Include stack trace in Not Entitled warning

* Remove redundant log message text

Author: prdoyle

libs/entitlement/src/main/java/org/elasticsearch/entitlement/runtime/policy/PolicyManager.java

@@ -555,11 +555,7 @@ private void notEntitled(String message, Class<?> callerClass, String componentN
             var moduleName = callerClass.getModule().getName();
             var loggerSuffix = "." + componentName + "." + ((moduleName == null) ? ALL_UNNAMED : moduleName);
             var notEntitledLogger = LogManager.getLogger(PolicyManager.class.getName() + loggerSuffix);
-            String frameInfoSuffix = StackWalker.getInstance(RETAIN_CLASS_REFERENCE)
-                .walk(this::findRequestingFrame)
-                .map(frame -> "\n\tat " + frame)
-                .orElse("");
-            notEntitledLogger.warn("Not entitled: " + message + frameInfoSuffix);
+            notEntitledLogger.warn("Not entitled:", exception);
         }
         throw exception;
     }