mgr/cephadm: force flag for ok-to-stop and ok-to-stop for monitoring stack

mgr/cephadm: force flag for ok-to-stop and ok-to-stop for monitoring stack

Daemons that could cause data loss when stopped will always block.

Daemons that will only cause loss in availability should block but have
a workaround in the form of a force flag if the user is okay with the service
being down.

Also implements ok-to-stop for monitoring stack daemons that uses this system
of blocking on availability loss unless force flag is provided

Signed-off-by: Adam King <adking@redhat.com>
Signed-off-by: Daniel-Pivonka <dpivonka@redhat.com>