CE-3114: Separate network and network scope fetching from listHosts

The network and network scope fields associated with the host have been moved to a separate endpoint. Since both fields can be accessed from the same endpoint through NetBox, we only need to create one endpoint that can be used to query both fields. The network data (network, scope) associated with the host is cached, so if we query the network associated with a host from the UI, the scope will be returned quickly for the same host afterward.

Some host related DTOs have been renamed to make it easier to determine their purpose.

Closes CE-3114