Mute org.elasticsearch.xpack.esql.qa.mixed.MixedClusterEsqlSpecIT test {union_types.MultiIndexIndirectUseOfUnionTypesInMvExpand SYNC} #119584

Author: elasticsearchmachine

muted-tests.yml

@@ -449,3 +449,6 @@ tests:
 - class: org.elasticsearch.upgrades.SearchStatesIT
   method: testCanMatch
   issue: https://github.com/elastic/elasticsearch/issues/118718
+- class: org.elasticsearch.xpack.esql.qa.mixed.MixedClusterEsqlSpecIT
+  method: test {union_types.MultiIndexIndirectUseOfUnionTypesInMvExpand SYNC}
+  issue: https://github.com/elastic/elasticsearch/issues/119584