Remove call to super.cleanupCluster in cleanup methods which does not override parent method (#122209)

ReindexDataStreamIndexAction.cleanupCluster called EsIntegTestCase.cleanupCluster, but did not override it. This caused EsIntegTestCase.cleanupCluster to be called twice, once in ReindexDataStreamIndexAction.cleanupCluster and once when the After annotation is called on EsIntegTestCase.

Author: parkertimmins

muted-tests.yml

@@ -371,8 +371,6 @@ tests:
   issue: https://github.com/elastic/elasticsearch/issues/121503
 - class: org.elasticsearch.xpack.application.CohereServiceUpgradeIT
   issue: https://github.com/elastic/elasticsearch/issues/121537
-- class: org.elasticsearch.xpack.migrate.action.ReindexDatastreamIndexTransportActionIT
-  issue: https://github.com/elastic/elasticsearch/issues/121737
 - class: org.elasticsearch.xpack.restart.FullClusterRestartIT
   method: testWatcherWithApiKey {cluster=UPGRADED}
   issue: https://github.com/elastic/elasticsearch/issues/122061

x-pack/plugin/migrate/src/internalClusterTest/java/org/elasticsearch/xpack/migrate/action/ReindexDatastreamIndexTransportActionIT.java

@@ -24,8 +24,6 @@
 import org.elasticsearch.action.bulk.BulkRequest;
 import org.elasticsearch.action.bulk.BulkResponse;
 import org.elasticsearch.action.index.IndexRequest;
-import org.elasticsearch.action.ingest.DeletePipelineRequest;
-import org.elasticsearch.action.ingest.DeletePipelineTransportAction;
 import org.elasticsearch.action.ingest.PutPipelineRequest;
 import org.elasticsearch.action.ingest.PutPipelineTransportAction;
 import org.elasticsearch.cluster.block.ClusterBlockException;
@@ -70,18 +68,8 @@
 
 public class ReindexDatastreamIndexTransportActionIT extends ESIntegTestCase {
     @After
-    private void cleanupCluster() throws Exception {
-        safeGet(
-            clusterAdmin().execute(
-                DeletePipelineTransportAction.TYPE,
-                new DeletePipelineRequest(
-                    TEST_REQUEST_TIMEOUT,
-                    TEST_REQUEST_TIMEOUT,
-                    MigrateTemplateRegistry.REINDEX_DATA_STREAM_PIPELINE_NAME
-                )
-            )
-        );
-        super.cleanUpCluster();
+    private void cleanup() {
+        deletePipeline(MigrateTemplateRegistry.REINDEX_DATA_STREAM_PIPELINE_NAME);
     }
 
     private static final String MAPPING = """