cephadm: add support for specific network binds to smb service

cephadm: add support for specific network binds to smb service

Add a bunch of code to support specific IP address (and/or interface -
see below) binds for the smb service. When the smb service is not
clustered it is using container networking - in this case we use
publish options for the container manager to only listen on the supplied
addresses.

When the smb service is clustered we need to jump through a bunch of
hoops to configure each service individually. Many are easy with just
a short set of CLI options. CTDB only listens on the (first) node
address that it can bind to and only that. smbd has complex interactions
based on the `interfaces` and `bind interfaces only` config parameters.
Because these parameters may be unique to a node (addresses certainly
will be - and interfaces names could be) we can not store this in
the registry based conf. Instead, we take the slightly hacky approach
of generating a stub conf file with just the interfaces related params
in them and telling sambacc to generate a config that includes this
stub config.

IMPORTANT: When using ctdb with public addresses smbd doesn't know what
additional IPs it may need to listen to, so instead of binding to
a fixed IP we configure it to use an interface. This does have a
downside of possibly listening to another address on the same interface
we don't want it to. Additionally, I have observed that as addresses
are added or removed from the interface by ctdb, smbd doesn't
consistently start listening to those addresses.

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