api: ceph: sort and update index sub-directory list

api: ceph: sort and update index sub-directory list

The 'cmd-safety', 'configdb' and 'mgr' items were missing, and while
directly calling the API endpoints worked, the api-viewer and pvesh
where partially broken here.

Sort the whole list alphabetically will make it easier to track in
the future

Signed-off-by: Aaron Lauterer <a.lauterer@proxmox.com>
 [ T: note which items where missing and reword slightly ]
Signed-off-by: Thomas Lamprecht <t.lamprecht@proxmox.com>