Fix testcase for MDEV-31240 to work with --view-protocol.

mysql-test/main/derived_cond_pushdown.result

@@ -18384,7 +18384,7 @@ from
 (select a, sum(b) as s from t2 group by a) as dt,
 t3
 where dt.a=t1.a and t3.a < 3
-)
+) as SUBQ
 from t1 limit 5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	1000	
@@ -18398,14 +18398,9 @@ from
 (select a, sum(b) as s from t2 group by a) as dt,
 t3
 where dt.a=t1.a and t3.a < 3
-)
+) as SUBQ
 from t1 limit 5;
-a	( select concat(t3.a,'=',dt.s)
-from
-(select a, sum(b) as s from t2 group by a) as dt,
-t3
-where dt.a=t1.a and t3.a < 3
-)
+a	SUBQ
 1	1=804
 2	1=1056
 3	1=846
@@ -18424,7 +18419,7 @@ from
 (select a, sum(b) as s from t2 group by a) as dt,
 t3
 where dt.a=t1.a and t3.a < 3
-)
+) as SUBQ
 from t1 limit 5;
 id	select_type	table	type	possible_keys	key	key_len	ref	rows	Extra
 1	PRIMARY	t1	ALL	NULL	NULL	NULL	NULL	1000	
@@ -18438,14 +18433,9 @@ from
 (select a, sum(b) as s from t2 group by a) as dt,
 t3
 where dt.a=t1.a and t3.a < 3
-)
+) as SUBQ
 from t1 limit 5;
-a	( select concat(t3.a,'=',dt.s)
-from
-(select a, sum(b) as s from t2 group by a) as dt,
-t3
-where dt.a=t1.a and t3.a < 3
-)
+a	SUBQ
 1	1=11858
 2	1=11380
 3	1=11588

mysql-test/main/derived_cond_pushdown.test

@@ -3997,7 +3997,7 @@ select
      (select a, sum(b) as s from t2 group by a) as dt,
      t3
    where dt.a=t1.a and t3.a < 3
-  )
+  ) as SUBQ
 from t1 limit 5;
 
 eval explain $q;