Mute org.elasticsearch.xpack.migrate.action.ReindexDatastreamIndexTransportActionIT testTimestamp0AddedIfMissing elastic#121745

Author: elasticsearchmachine

muted-tests.yml

@@ -542,3 +542,6 @@ tests:
 - class: org.elasticsearch.xpack.esql.action.CrossClustersCancellationIT
   method: testCancelSkipUnavailable
   issue: https://github.com/elastic/elasticsearch/issues/121631
+- class: org.elasticsearch.xpack.migrate.action.ReindexDatastreamIndexTransportActionIT
+  method: testTimestamp0AddedIfMissing
+  issue: https://github.com/elastic/elasticsearch/issues/121745