[CARMEL-6148] Adjust Partition Size considering ExpandExec project size in AQE (#1072)

Author: xingchaozh

sql/core/src/main/scala/org/apache/spark/sql/execution/adaptive/CoalesceShufflePartitions.scala

@@ -131,7 +131,7 @@ case class CoalesceShufflePartitions(session: SparkSession)
           case _ =>
         })
       case _: BroadcastNestedLoopJoinExec => reduceRatio += 3
-      case _: ExpandExec => reduceRatio += 1
+      case expand: ExpandExec => reduceRatio += expand.projections.size
       case SortMergeJoinExec(_, _, _, Some(condition), _, _, _)
           if containsInequalityPredicate(condition) => reduceRatio += 2
       case _ =>