make chooseOneAggShuffleKey default value true

Author: feiniaofeiafei

fe/fe-core/src/main/java/org/apache/doris/qe/SessionVariable.java

@@ -2663,7 +2663,7 @@ public boolean isEnableHboNonStrictMatchingMode() {
     public boolean aggShuffleUseParentKey = true;
 
     @VariableMgr.VarAttr(name = CHOOSE_ONE_AGG_SHUFFLE_KEY, needForward = false)
-    public boolean chooseOneAggShuffleKey = false;
+    public boolean chooseOneAggShuffleKey = true;
 
     @VariableMgr.VarAttr(name = ENABLE_PREFER_CACHED_ROWSET, needForward = false,
             description = {"是否启用 prefer cached rowset 功能",