pg_upgrade: Check for the expected error message in TAP tests.

Since pg_upgrade prints its error messages on stdout, we can't use
command_fails_like() to check if it fails for the right reason. This
commit uses command_checks_all() in pg_upgrade TAP tests to check the
exit status and stdout, enabling proper verification of error
reasons.

Author: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Discussion: https://postgr.es/m/87tt8h1vb7.fsf@wibble.ilmari.org

src/bin/pg_upgrade/t/002_pg_upgrade.pl

@@ -396,7 +396,7 @@ $oldnode->stop;
 # Cause a failure at the start of pg_upgrade, this should create the logging
 # directory pg_upgrade_output.d but leave it around.  Keep --check for an
 # early exit.
-command_fails(
+command_checks_all(
 	[
 		'pg_upgrade', '--no-sync',
 		'-d', $oldnode->data_dir,
@@ -408,6 +408,9 @@ command_fails(
 		'-P', $newnode->port,
 		$mode, '--check',
 	],
+	1,
+	[qr{check for ".*?does/not/exist" failed}],
+	[],
 	'run of pg_upgrade --check for new instance with incorrect binary path');
 ok(-d $newnode->data_dir . "/pg_upgrade_output.d",
 	"pg_upgrade_output.d/ not removed after pg_upgrade failure");

src/bin/pg_upgrade/t/004_subscription.pl

@@ -130,7 +130,7 @@ $old_sub->safe_psql('postgres',
 
 $old_sub->stop;
 
-command_fails(
+command_checks_all(
 	[
 		'pg_upgrade',
 		'--no-sync',
@@ -144,6 +144,11 @@ command_fails(
 		$mode,
 		'--check',
 	],
+	1,
+	[
+		qr/\QYour installation contains subscriptions without origin or having relations not in i (initialize) or r (ready) state\E/
+	],
+	[],
 	'run of pg_upgrade --check for old instance with relation in \'d\' datasync(invalid) state and missing replication origin'
 );
 

src/bin/pg_upgrade/t/005_char_signedness.pl

@@ -41,7 +41,7 @@ command_like(
 	'updated default char signedness is unsigned in control file');
 
 # Cannot use --set-char-signedness option for upgrading from v18+
-command_fails(
+command_checks_all(
 	[
 		'pg_upgrade', '--no-sync',
 		'-d', $old->data_dir,
@@ -54,6 +54,9 @@ command_fails(
 		'--set-char-signedness', 'signed',
 		$mode
 	],
+	1,
+	[qr/--set-char-signedness option cannot be used/],
+	[],
 	'--set-char-signedness option cannot be used for upgrading from v18 or later'
 );