pgbench: Use standard option handling test routines

Run program_XXX tests instead of its own tests.  This ensures
consistency with the test suites of other programs and enforces common
policies, such as help line length.

Author: Hayato Kuroda <kuroda.hayato@fujitsu.com>
Reviewed-by: Fujii Masao <masao.fujii@oss.nttdata.com>
Discussion: https://www.postgresql.org/message-id/flat/OSCPR01MB14966247015B7E3D8D340D022F56FA@OSCPR01MB14966.jpnprd01.prod.outlook.com

src/bin/pgbench/t/002_pgbench_no_server.pl

@@ -233,21 +233,9 @@ for my $o (@options)
 		'pgbench option error: ' . $name);
 }
 
-# Help
-pgbench(
-	'--help', 0,
-	[
-		qr{benchmarking tool for PostgreSQL},
-		qr{Usage},
-		qr{Initialization options:},
-		qr{Common options:},
-		qr{Report bugs to}
-	],
-	[qr{^$}],
-	'pgbench help');
-
-# Version
-pgbench('-V', 0, [qr{^pgbench .PostgreSQL. }], [qr{^$}], 'pgbench version');
+program_help_ok('pgbench');
+program_version_ok('pgbench');
+program_options_handling_ok('pgbench');
 
 # list of builtins
 pgbench(