mgr/smb: create a new resource component for remote control

mgr/smb: create a new resource component for remote control

Remote control is a new optional feature of the samba-container. It runs
a small "sidecar" service that provides a (g)RPC interface that bridges
certain runtime operations, like disconnecting a particular client,
from the cloudy-gRPC world to samba's existing tooling.
Add a new type that can be used to configure this sidecar service.

Signed-off-by: John Mulligan <jmulligan@redhat.com>