Raise a timeout to 180s, in test 010_logical_decoding_timelines.pl.

Per buildfarm member hornet.  Also, update Pod documentation showing the
lower value.  Back-patch to v10, where the test first appeared.

src/test/perl/PostgresNode.pm

@@ -31,9 +31,9 @@ PostgresNode - class representing PostgreSQL server instance
   # as well as the psql exit code. Pass some extra psql
   # options. If there's an error from psql raise an exception.
   my ($stdout, $stderr, $timed_out);
-  my $cmdret = $node->psql('postgres', 'SELECT pg_sleep(60)',
+  my $cmdret = $node->psql('postgres', 'SELECT pg_sleep(600)',
 	  stdout => \$stdout, stderr => \$stderr,
-	  timeout => 30, timed_out => \$timed_out,
+	  timeout => 180, timed_out => \$timed_out,
 	  extra_params => ['--single-transaction'],
 	  on_error_die => 1)
   print "Sleep timed out" if $timed_out;
@@ -1613,9 +1613,9 @@ If given, it must be an array reference containing additional parameters to B<ps
 e.g.
 
 	my ($stdout, $stderr, $timed_out);
-	my $cmdret = $node->psql('postgres', 'SELECT pg_sleep(60)',
+	my $cmdret = $node->psql('postgres', 'SELECT pg_sleep(600)',
 		stdout => \$stdout, stderr => \$stderr,
-		timeout => 30, timed_out => \$timed_out,
+		timeout => 180, timed_out => \$timed_out,
 		extra_params => ['--single-transaction'])
 
 will set $cmdret to undef and $timed_out to a true value.

src/test/recovery/t/010_logical_decoding_timelines.pl

@@ -158,7 +158,7 @@ like(
 ($ret, $stdout, $stderr) = $node_replica->psql(
 	'postgres',
 	"SELECT data FROM pg_logical_slot_peek_changes('before_basebackup', NULL, NULL, 'include-xids', '0', 'skip-empty-xacts', '1');",
-	timeout => 30);
+	timeout => 180);
 is($ret, 0, 'replay from slot before_basebackup succeeds');
 
 my $final_expected_output_bb = q(BEGIN