Make sure SM isn't running alongside entitlements tests (#127082)

closes #127077

libs/entitlement/src/test/java/org/elasticsearch/entitlement/initialization/EntitlementInitializationTests.java

@@ -26,6 +26,7 @@ import static org.hamcrest.Matchers.both;
 import static org.hamcrest.Matchers.endsWith;
 import static org.hamcrest.Matchers.startsWith;
 
+@ESTestCase.WithoutSecurityManager
 public class EntitlementInitializationTests extends ESTestCase {
 
     private static PathLookup TEST_PATH_LOOKUP;