BE: Pass in filter_type when creating the refresh account request
    
    For refreshing AD users and groups, we'll want to create a request by
    SID, for all other requests we'll want to create a request by name. This
    patch allows parametrizing the request creation by the caller.
    
    Related:
    https://pagure.io/SSSD/sssd/issue/4012
    
    Reviewed-by: Sumit Bose <sbose@redhat.com>