Add a "status" property to Almanac devices
Ref T13641. Add a "status" property with most of the relevant support code.
This currently has no impact on use of the device or bindings by Diffusion or Drydock: they ignore the status of devices bound to services.
- Created a new device.
- Changed the status of a device via web and API.
- Queried for devices via API.
- Searched for active and disabled devices.
- Viewed UI in list view, detail view.
- Used typeahead to add a new binding to an interface on a disabled device, got disabled hint in typeahead UI.
Maniphest Tasks: T13641
Differential Revision: https://secure.phabricator.com/D21627