[ML] Fix JobsAndModelsIT (elastic#137084)

This PR removes assertion assertRecentLastTaskStateChangeTime at the end of the test.

This assertion is not required for the core purpose of the test to verify that:

Jobs and models don't get allocated to the same node when they don't fit
Both eventually get allocated to different nodes when capacity allows
At the same time, it introduce the dependency on how busy the CI is when running the test.

Author: valeriy42

x-pack/plugin/ml/src/internalClusterTest/java/org/elasticsearch/xpack/ml/integration/JobsAndModelsIT.java

@@ -16,7 +16,6 @@
 import org.elasticsearch.test.ESIntegTestCase;
 import org.elasticsearch.xcontent.XContentBuilder;
 import org.elasticsearch.xcontent.json.JsonXContent;
-import org.elasticsearch.xpack.core.ml.MlTasks;
 import org.elasticsearch.xpack.core.ml.action.CloseJobAction;
 import org.elasticsearch.xpack.core.ml.action.GetJobsStatsAction;
 import org.elasticsearch.xpack.core.ml.action.GetTrainedModelsStatsAction;
@@ -38,8 +37,6 @@
 import org.elasticsearch.xpack.ml.inference.persistence.TrainedModelDefinitionDoc;
 import org.elasticsearch.xpack.ml.support.BaseMlIntegTestCase;
 
-import java.time.Duration;
-import java.time.temporal.ChronoUnit;
 import java.util.List;
 import java.util.Set;
 
@@ -59,7 +56,6 @@
 @ESIntegTestCase.ClusterScope(scope = ESIntegTestCase.Scope.TEST, numDataNodes = 0)
 public class JobsAndModelsIT extends BaseMlIntegTestCase {
 
-    @AwaitsFix(bugUrl = "https://github.com/elastic/elasticsearch/issues/103588")
     public void testCluster_GivenAnomalyDetectionJobAndTrainedModelDeployment_ShouldNotAllocateBothOnSameNode() throws Exception {
         // This test starts 2 ML nodes and then starts an anomaly detection job and a
         // trained model deployment that do not both fit in one node. We then proceed
@@ -237,8 +233,6 @@ public void testCluster_GivenAnomalyDetectionJobAndTrainedModelDeployment_Should
             assertThat(jobStats.getNode(), is(not(equalTo(modelStats.getDeploymentStats().getNodeStats().get(0).getNode()))));
         });
 
-        assertRecentLastTaskStateChangeTime(MlTasks.jobTaskId(jobId), Duration.of(10, ChronoUnit.SECONDS), null);
-
         // Clean up
         client().execute(CloseJobAction.INSTANCE, new CloseJobAction.Request(jobId).setForce(true)).actionGet();
         client().execute(StopTrainedModelDeploymentAction.INSTANCE, new StopTrainedModelDeploymentAction.Request(model.getModelId()))