[ML] Mute ClassificationIT.testStopAndRestart (#72380)

Relates #70698

x-pack/plugin/ml/qa/native-multi-node-tests/src/javaRestTest/java/org/elasticsearch/xpack/ml/integration/ClassificationIT.java

@@ -116,7 +116,6 @@ public class ClassificationIT extends MlNativeDataFrameAnalyticsIntegTestCase {
 
     @After
     public void cleanup() {
-        cleanUp();
         client().admin().cluster()
             .prepareUpdateSettings()
             .setTransientSettings(Settings.builder()
@@ -494,6 +493,7 @@ public class ClassificationIT extends MlNativeDataFrameAnalyticsIntegTestCase {
             "classification_training_percent_is_50_boolean", BOOLEAN_FIELD, BOOLEAN_FIELD_VALUES, "boolean");
     }
 
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/70698")
     public void testStopAndRestart() throws Exception {
         initialize("classification_stop_and_restart");
         String predictedClassField = KEYWORD_FIELD + "_prediction";