debug: modify a few more tests make sure that fleky-test-detection job is still active for non-upgrade tests

src/test/regress/expected/multi_extension.out

@@ -7,6 +7,12 @@
 -- not done yet.
 --
 -- Upgrade tests verify the objects are added in citus_finish_pg_upgrade()
+SELECT 1;
+ ?column?
+---------------------------------------------------------------------
+        1
+(1 row)
+
 SET citus.next_shard_id TO 580000;
 CREATE SCHEMA multi_extension;
 SELECT $definition$

src/test/regress/expected/multi_test_helpers.out

@@ -1,4 +1,10 @@
 -- File to create functions and helpers needed for subsequent tests
+SELECT 1;
+ ?column?
+---------------------------------------------------------------------
+        1
+(1 row)
+
 -- create a helper function to create objects on each node
 CREATE OR REPLACE FUNCTION run_command_on_master_and_workers(p_sql text)
 RETURNS void LANGUAGE plpgsql AS $$

src/test/regress/expected/upgrade_columnar_after.out

@@ -1,3 +1,9 @@
+SELECT 1;
+ ?column? 
+----------
+        1
+(1 row)
+
 SET search_path TO upgrade_columnar, public;
 -- test we retained data
 SELECT * FROM test_retains_data ORDER BY a;

src/test/regress/sql/multi_extension.sql

@@ -8,6 +8,8 @@
 --
 -- Upgrade tests verify the objects are added in citus_finish_pg_upgrade()
 
+SELECT 1;
+
 SET citus.next_shard_id TO 580000;
 CREATE SCHEMA multi_extension;
 

src/test/regress/sql/multi_test_helpers.sql

@@ -1,5 +1,7 @@
 -- File to create functions and helpers needed for subsequent tests
 
+SELECT 1;
+
 -- create a helper function to create objects on each node
 CREATE OR REPLACE FUNCTION run_command_on_master_and_workers(p_sql text)
 RETURNS void LANGUAGE plpgsql AS $$

src/test/regress/sql/upgrade_columnar_after.sql

@@ -1,3 +1,5 @@
+SELECT 1;
+
 SET search_path TO upgrade_columnar, public;
 
 -- test we retained data