archwiki: Update access levels: add additional rights to sysops

MediaWiki 1.32 split off sitewide CSS, JS and JSON editing from the editinterface right. These additional rights are now granted to the interface-admin group, but not to sysops.
Add back the lost rights so that sysops once again have full control over the user interface.

Mediawiki 1.34 grants rights to the suppress group by default. Since Arch Wiki does not need the kind of separation that Wikimedia sites use, grant all those rights to sysops.

roles/archwiki/templates/LocalSettings.php.j2

@@ -233,6 +233,12 @@ $wgGroupPermissions['*']['edit'] = false;
 
 # extra rights for sysop
 $wgGroupPermissions['sysop']['deleterevision']  = true;
+if ( isset( $wgGroupPermissions['interface-admin'] ) ) {
+    $wgGroupPermissions['sysop'] += $wgGroupPermissions['interface-admin'];
+}
+if ( isset( $wgGroupPermissions['suppress'] ) ) {
+    $wgGroupPermissions['sysop'] += $wgGroupPermissions['suppress'];
+}
 
 # disable uploads by normal users
 $wgGroupPermissions['user']['upload']          = false;