[fix](planner)literal expr should do nothing in substituteImpl() method (#23438)

substitute a literal expr is pointless and wrong. This pr keep literal expr unchanged during substitute process

fe/fe-core/src/main/java/org/apache/doris/analysis/LiteralExpr.java

@@ -402,4 +402,10 @@ public abstract class LiteralExpr extends Expr implements Comparable<LiteralExpr
     public boolean matchExprs(List<Expr> exprs, SelectStmt stmt, boolean ignoreAlias, TupleDescriptor tuple) {
         return true;
     }
+
+    @Override
+    protected Expr substituteImpl(ExprSubstitutionMap smap, ExprSubstitutionMap disjunctsMap,
+            Analyzer analyzer) {
+        return this;
+    }
 }

regression-test/data/correctness_p0/test_subquery_with_agg.out

@@ -4,3 +4,6 @@
 2
 3
 
+-- !select2 --
+0	2.0
+

regression-test/suites/correctness_p0/test_subquery_with_agg.groovy

@@ -63,6 +63,21 @@ suite("test_subquery_with_agg") {
         subq_1.gid;
     """
 
+    qt_select2 """
+    select
+        0 as row_number,
+        round(sum(num) / 10, 0) as org_id
+    from
+    (
+        select
+            num
+        from
+            agg_subquery_table
+    ) t
+    group by
+        1;
+    """
+
     sql """
         drop table if exists agg_subquery_table;
     """