[FEAT MERGE] impl vectorization 2.0

Co-authored-by: oceanoverflow <oceanoverflow@gmail.com>
Co-authored-by: hezuojiao <hezuojiao@gmail.com>
Co-authored-by: Monk-Liu <1152761042@qq.com>

unittest/sql/engine/aggregate/test_hash_groupby2.schema

@@ -0,0 +1,5 @@
+#create database opt;
+#use opt;
+create table t1(c1 int, c2 int);
+create table t2(c1 int, c2 int);
+create table t3(c1 int, c2 int, c3 double, c4 char(20), c5 varchar(40));