pg_dump tests: don't put dumps in stdout

This bloats the regression log files for no reason. Backpatch to 18; no further only because it fails to apply cleanly. (It's just whitespace change that conflicts, but I don't think this warrants more effort than this.) Discussion: https://postgr.es/m/202511251218.zfs4nu2qnh2m@alvherre.pgsql

Author: alvherre

src/bin/pg_dump/t/002_pg_dump.pl

@@ -5019,7 +5019,12 @@
 # Test dumping pg_catalog (for research -- cannot be reloaded)
 
 $node->command_ok(
-[ 'pg_dump', '--port' => $port, '--schema' => 'pg_catalog' ],
+[
+'pg_dump',
+'--port' => $port,
+'--schema' => 'pg_catalog',
+'--file' => "$tempdir/pgdump_pgcatalog.dmp"
+],
 'pg_dump: option -n pg_catalog');
 
 #########################################
@@ -5029,7 +5034,8 @@
 [
 'pg_dumpall',
 '--port' => $port,
-'--exclude-database' => '"myhost.mydb"'
+'--exclude-database' => '"myhost.mydb"',
+'--file' => "$tempdir/pgdumpall.dmp"
 ],
 'pg_dumpall: option --exclude-database handles database names with embedded dots'
 );