[SPARK-28530][SQL] Cost-based join reorder optimizer batch should be FixedPoint(1)

sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/optimizer/Optimizer.scala

@@ -49,7 +49,6 @@ abstract class Optimizer(sessionCatalog: SessionCatalog)
 
   override protected val blacklistedOnceBatches: Set[String] =
     Set("Pullup Correlated Expressions",
-      "Join Reorder",
       "Extract Python UDFs"
     )
 
@@ -168,7 +167,7 @@ abstract class Optimizer(sessionCatalog: SessionCatalog)
       RemoveLiteralFromGroupExpressions,
       RemoveRepetitionFromGroupExpressions) :: Nil ++
     operatorOptimizationBatch) :+
-    Batch("Join Reorder", Once,
+    Batch("Join Reorder", FixedPoint(1),
       CostBasedJoinReorder) :+
     Batch("Remove Redundant Sorts", Once,
       RemoveRedundantSorts) :+

sql/catalyst/src/test/scala/org/apache/spark/sql/catalyst/optimizer/JoinReorderSuite.scala

@@ -40,7 +40,7 @@ class JoinReorderSuite extends PlanTest with StatsEstimationTestBase {
         PushPredicateThroughJoin,
         ColumnPruning,
         CollapseProject) ::
-      Batch("Join Reorder", Once,
+      Batch("Join Reorder", FixedPoint(1),
         CostBasedJoinReorder) :: Nil
   }