mgr/cephadm: add more aggressive force flag for host maintenance enter

mgr/cephadm: add more aggressive force flag for host maintenance enter

Right now, we have safety checks that will either say things are okay to stop,
return warnings, or returns "alerts". Warnings can be bypassed already with
the --force flag that exists for the command. However, the alerts cannot be
bypassed and cephadm will refuse to attempt to put the host in maintenance mode.
The idea here is for an additional flag that also bypasses that alerts, in cases
where a user really needs to put the host into maintenance mode even if that
means causing issues within the cluster.

Fixes: https://tracker.ceph.com/issues/58892
Signed-off-by: Adam King <adking@redhat.com>