pg_stat_statements: Add test coverage for pg_stat_statements_reset_1_7

Run pg_stat_statements_reset() once while the appropriate extension
version is installed.

Reviewed-by: Michael Paquier <michael@paquier.xyz>
Discussion: https://www.postgresql.org/message-id/flat/40d1e4f2-835f-448f-a541-8ff5db75bf3d@eisentraut.org

contrib/pg_stat_statements/expected/oldextversions.out

@@ -52,6 +52,12 @@ SELECT pg_get_functiondef('pg_stat_statements_reset'::regproc);
  
 (1 row)
 
+SELECT pg_stat_statements_reset();
+ pg_stat_statements_reset 
+--------------------------
+ 
+(1 row)
+
 \d pg_stat_statements
                     View "public.pg_stat_statements"
        Column        |       Type       | Collation | Nullable | Default 
@@ -330,4 +336,10 @@ SELECT pg_get_functiondef('pg_stat_statements_reset'::regproc);
  
 (1 row)
 
+SELECT pg_stat_statements_reset() IS NOT NULL AS t;
+ t 
+---
+ t
+(1 row)
+
 DROP EXTENSION pg_stat_statements;

contrib/pg_stat_statements/sql/oldextversions.sql

@@ -28,6 +28,7 @@ SET SESSION AUTHORIZATION pg_read_all_stats;
 SELECT pg_stat_statements_reset();
 RESET SESSION AUTHORIZATION;
 SELECT pg_get_functiondef('pg_stat_statements_reset'::regproc);
+SELECT pg_stat_statements_reset();
 \d pg_stat_statements
 SELECT count(*) > 0 AS has_data FROM pg_stat_statements;
 
@@ -55,5 +56,6 @@ AlTER EXTENSION pg_stat_statements UPDATE TO '1.11';
 SELECT count(*) > 0 AS has_data FROM pg_stat_statements;
 -- New parameter minmax_only of pg_stat_statements_reset function
 SELECT pg_get_functiondef('pg_stat_statements_reset'::regproc);
+SELECT pg_stat_statements_reset() IS NOT NULL AS t;
 
 DROP EXTENSION pg_stat_statements;