[SPARK-28699][Core] Disable using radix sort for ShuffleExchangeExec …

…in repartition case

sql/core/src/main/scala/org/apache/spark/sql/execution/exchange/ShuffleExchangeExec.scala

@@ -242,7 +242,7 @@ object ShuffleExchangeExec {
           }
           // The comparator for comparing row hashcode, which should always be Integer.
           val prefixComparator = PrefixComparators.LONG
-          val canUseRadixSort = SQLConf.get.enableRadixSort
+
           // The prefix computer generates row hashcode as the prefix, so we may decrease the
           // probability that the prefixes are equal when input rows choose column values from a
           // limited range.
@@ -264,7 +264,7 @@ object ShuffleExchangeExec {
             prefixComparator,
             prefixComputer,
             pageSize,
-            canUseRadixSort)
+            false /* canUseRadixSort */)
           sorter.sort(iter.asInstanceOf[Iterator[UnsafeRow]])
         }
       } else {