Fix could not receive query results error in regression test ouput

src/test/regress/expected/set_operation_and_local_tables.out

@@ -72,9 +72,8 @@ DEBUG:  generating subplan 10_1 for subquery SELECT x FROM recursive_set_local.t
 DEBUG:  Plan 10 query after replacing subqueries and CTEs: SELECT intermediate_result.x FROM read_intermediate_result('10_1'::text, 'binary'::citus_copy_format) intermediate_result(x integer) INTERSECT SELECT (i.i OPERATOR(pg_catalog./) 0) FROM generate_series(0, 100) i(i) ORDER BY 1 DESC
 DEBUG:  Creating router plan
 DEBUG:  Plan is router executable
-WARNING:  division by zero
+ERROR:  division by zero
 CONTEXT:  while executing command on localhost:57637
-ERROR:  could not receive query results
 -- we should be able to run set operations with generate series and local tables as well
 ((SELECT x FROM local_test) UNION ALL (SELECT x FROM test)) INTERSECT (SELECT i FROM generate_series(0, 100) i) ORDER BY 1 DESC;
 DEBUG:  generating subplan 12_1 for subquery SELECT x FROM recursive_set_local.local_test

src/test/regress/expected/with_basics.out

@@ -106,9 +106,8 @@ WITH cte AS (
 	SELECT user_id FROM users_table WHERE value_2 IN (1, 2)
 )
 SELECT (SELECT * FROM cte);
-WARNING:  more than one row returned by a subquery used as an expression
+ERROR:  more than one row returned by a subquery used as an expression
 CONTEXT:  while executing command on localhost:57637
-ERROR:  could not receive query results
 WITH cte_basic AS (
 	SELECT user_id FROM users_table WHERE user_id = 1
 )