Server affinity: Don't rely just on [ca|kra]_enabled for installs
    
    ca_enable and kra_enabled are intended to be used to identify that
    a CA or KRA is available in the topology. It was also being used
    to determine whether a CA or KRA service is desired on a replica
    install, rather than options.setup_[ca|kra]
    
    Fixes: https://pagure.io/freeipa/issue/9510
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>