[ML] Temporarily muting failing tests

Muting a number of AutoDetectMemoryLimitIT tests to give CI a chance to
settle before easing in required backend changes.

relates elastic/ml-cpp#486
relates #42086

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

@@ -84,6 +84,7 @@ public class AutodetectMemoryLimitIT extends MlNativeAutodetectIntegTestCase {
         assertThat(modelSizeStats.getMemoryStatus(), equalTo(ModelSizeStats.MemoryStatus.HARD_LIMIT));
     }
 
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/42207")
     public void testTooManyByFields() throws Exception {
         Detector.Builder detector = new Detector.Builder("count", null);
         detector.setByFieldName("user");
@@ -129,6 +130,7 @@ public class AutodetectMemoryLimitIT extends MlNativeAutodetectIntegTestCase {
         assertThat(modelSizeStats.getMemoryStatus(), equalTo(ModelSizeStats.MemoryStatus.HARD_LIMIT));
     }
 
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/42207")
     public void testTooManyByAndOverFields() throws Exception {
         Detector.Builder detector = new Detector.Builder("count", null);
         detector.setByFieldName("department");
@@ -178,6 +180,7 @@ public class AutodetectMemoryLimitIT extends MlNativeAutodetectIntegTestCase {
         assertThat(modelSizeStats.getMemoryStatus(), equalTo(ModelSizeStats.MemoryStatus.HARD_LIMIT));
     }
 
+    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/42207")
     public void testManyDistinctOverFields() throws Exception {
         Detector.Builder detector = new Detector.Builder("sum", "value");
         detector.setOverFieldName("user");