Bound waits in 035_standby_logical_decoding.pl.

One IPC::Run::start() used an IPC::Run::timer() without checking for
expiration.  The other used no timeout or timer.  Back-patch to v16,
which introduced the test.

Reviewed by Bertrand Drouvot.

Discussion: https://postgr.es/m/20240211010227.a2.nmisch@google.com

Author: nmisch

src/test/recovery/t/035_standby_logical_decoding.pl

@@ -21,7 +21,6 @@
   PostgreSQL::Test::Cluster->new('cascading_standby');
 my $node_subscriber = PostgreSQL::Test::Cluster->new('subscriber');
 my $default_timeout = $PostgreSQL::Test::Utils::timeout_default;
-my $psql_timeout = IPC::Run::timer($default_timeout);
 my $res;
 
 # Name for the physical slot on primary
@@ -90,7 +89,8 @@ sub make_slot_active
 		'>',
 		$to_stdout,
 		'2>',
-		$to_stderr);
+		$to_stderr,
+		IPC::Run::timeout($default_timeout));
 
 	if ($wait)
 	{
@@ -341,7 +341,7 @@ sub wait_until_vacuum_can_remove
 	\$psql_subscriber{subscriber_stdout},
 	'2>',
 	\$psql_subscriber{subscriber_stderr},
-	$psql_timeout);
+	IPC::Run::timeout($default_timeout));
 
 ##################################################
 # Test that logical decoding on the standby