Revert "archwiki: Enable background jobs to fix slow category updating"

This reverts commit 967cc0b2.

Not all jobs are run, some lead to massive db updates causing very high
load.

roles/archwiki/templates/LocalSettings.php.j2

@@ -76,8 +76,8 @@ $wgResourceLoaderMaxQueryLength = -1;
 
 $wgGitRepositoryViewers['.+projects\.archlinux\.org/vhosts/wiki\.archlinux\.org\.git(.*)'] = 'https://projects.archlinux.org/vhosts/wiki.archlinux.org.git/commit/?id=%H';
 
-$wgJobRunRate = 1;
-$wgRunJobsAsync = 0;
+$wgJobRunRate = 0;
+$wgRunJobsAsync = 1;
 
 # Enable subpages in the main namespace (FS#39668)
 $wgNamespacesWithSubpages[NS_MAIN] = true;