Add missing future.get to fix tests

Author: parkertimmins

muted-tests.yml

@@ -396,8 +396,6 @@ tests:
   issue: https://github.com/elastic/elasticsearch/issues/121465
 - class: org.elasticsearch.xpack.esql.qa.multi_node.EsqlSpecIT
   issue: https://github.com/elastic/elasticsearch/issues/121411
-- class: org.elasticsearch.xpack.migrate.action.ReindexDatastreamIndexTransportActionIT
-  issue: https://github.com/elastic/elasticsearch/issues/121737
 
 # Examples:
 #

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

@@ -74,7 +74,7 @@ private void cleanupCluster() throws Exception {
         clusterAdmin().execute(
             DeletePipelineTransportAction.TYPE,
             new DeletePipelineRequest(TEST_REQUEST_TIMEOUT, TEST_REQUEST_TIMEOUT, MigrateTemplateRegistry.REINDEX_DATA_STREAM_PIPELINE_NAME)
-        );
+        ).actionGet();
         super.cleanUpCluster();
     }