archwiki: Update access levels: add a new access level called "privileged"

The "privileged" group is intended for highly trusted members of the community who, for various reasons, require more rights than a regular user.
The group is granted rights appropriate for a trusted person (i.e. editing pages protected with "editprotected2"), but not the rights reserved for wiki maintenance.

roles/archwiki/templates/LocalSettings.php.j2

@@ -252,10 +252,16 @@ $wgGroupPermissions['cosysop']['unwatchedpages'] = true;
 $wgGroupPermissions['cosysop']['deletedhistory'] = true;
 $wgGroupPermissions['cosysop']['deletedtext'] = true;
 
+# privileged's rights
+$wgGroupPermissions['privileged']['patrolmarks'] = true;
+$wgGroupPermissions['privileged']['noratelimit'] = true;
+$wgGroupPermissions['privileged']['suppressredirect'] = true;
+
 # additional page-protection levels
 $wgRestrictionLevels[] = 'editprotected2';
 $wgGroupPermissions['sysop']['editprotected2'] = true;
 $wgGroupPermissions['cosysop']['editprotected2'] = true;
+$wgGroupPermissions['privileged']['editprotected2'] = true;
 
 $wgEnableWriteAPI = true;
 # disable user account creation via API