Mute org.elasticsearch.xpack.esql.qa.single_node.EsqlSpecIT test {lookup-join.MvJoinKeyFromRow SYNC} #124951

muted-tests.yml

@@ -372,6 +372,9 @@ tests:
 - class: org.elasticsearch.datastreams.lifecycle.DataStreamLifecycleServiceIT
   method: testErrorRecordingOnRetention
   issue: https://github.com/elastic/elasticsearch/issues/124950
+- class: org.elasticsearch.xpack.esql.qa.single_node.EsqlSpecIT
+  method: test {lookup-join.MvJoinKeyFromRow SYNC}
+  issue: https://github.com/elastic/elasticsearch/issues/124951
 
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