Use single update LDIF for indices
    
    Index definitions were split across four files. indices.ldif contained
    the initial subset of indices. Three update files partly duplicated the
    indices and partly added new indices.
    
    All indices are now defined in a single update file that is sorted
    alphanumerically.
    
    The changeset avoids two additional index tasks and reduces installation
    time by 5 to 10 seconds.
    
    Fixes: https://pagure.io/freeipa/issue/8493
    Signed-off-by: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>