[8.x] ESQL: Disable LOOKUP JOIN physical optimizer test on release (#118754)

* Disable test on release builds

* Unmute

Author: alex-spies

muted-tests.yml

@@ -461,9 +461,6 @@ tests:
 - class: org.elasticsearch.xpack.application.HuggingFaceServiceUpgradeIT
   method: testElser {upgradedNodes=1}
   issue: https://github.com./elastic/elasticsearch/issues/118127
-- class: org.elasticsearch.xpack.esql.optimizer.PhysicalPlanOptimizerTests
-  method: testVerifierOnMissingReferencesWithBinaryPlans {default}
-  issue: https://github.com./elastic/elasticsearch/issues/118707
 - class: org.elasticsearch.xpack.application.CohereServiceUpgradeIT
   method: testCohereEmbeddings {upgradedNodes=1}
   issue: https://github.com./elastic/elasticsearch/issues/116974

x-pack/plugin/esql/src/test/java/org/elasticsearch/xpack/esql/optimizer/PhysicalPlanOptimizerTests.java

@@ -2329,6 +2329,8 @@ public void testVerifierOnMissingReferences() {
     }
 
     public void testVerifierOnMissingReferencesWithBinaryPlans() throws Exception {
+        assumeTrue("Requires LOOKUP JOIN", EsqlCapabilities.Cap.JOIN_LOOKUP_V5.isEnabled());
+
         // Do not assert serialization:
         // This will have a LookupJoinExec, which is not serializable because it doesn't leave the coordinator.
         var plan = physicalPlan("""