MDEV-23004 When using GROUP BY with JSON_ARRAYAGG with joint table, the square brackets are not included

make test results stable

followup for 98c7916

Author: vuvova

mysql-test/main/func_json.result

@@ -1372,7 +1372,7 @@ CREATE TABLE t1(id int primary key, name varchar(50));
 CREATE TABLE t2(id int, owner_id int);
 INSERT INTO t1 VALUES (1, "name1"), (2, "name2"), (3, "name3");
 INSERT INTO t2 VALUES (1, 1), (2, 1), (3, 2), (4, 3);
-SELECT t1.id, JSON_ARRAYAGG(JSON_OBJECT('id',t2.id)) as materials
+SELECT t1.id, JSON_ARRAYAGG(JSON_OBJECT('id',t2.id) ORDER BY t2.id) as materials
 from t1 LEFT JOIN t2 on t1.id = t2.owner_id
 GROUP BY t1.id ORDER BY id;
 id	materials

mysql-test/main/func_json.test

@@ -866,7 +866,7 @@ CREATE TABLE t2(id int, owner_id int);
 INSERT INTO t1 VALUES (1, "name1"), (2, "name2"), (3, "name3");
 INSERT INTO t2 VALUES (1, 1), (2, 1), (3, 2), (4, 3);
 
-SELECT t1.id, JSON_ARRAYAGG(JSON_OBJECT('id',t2.id)) as materials
+SELECT t1.id, JSON_ARRAYAGG(JSON_OBJECT('id',t2.id) ORDER BY t2.id) as materials
   from t1 LEFT JOIN t2 on t1.id = t2.owner_id
   GROUP BY t1.id ORDER BY id;