ootb: apiclient needs to be model agnostic

[webern]

Migrate apiclient to a server client model, to allow the client to be model agnostic

apiclient needs to no longer depend on the models crate. To do this it will rely on responses from apiserver and heuristics on those responses to maintain its current functionality.

[webern]

apiclient needs to no longer depend on the models crate. To do this it will rely on responses from apiserver and heuristics on those responses to maintain its current functionality.

[bcressey]

This was completed as part of the overall move to settings plugins.