Release the v7 model

[thgreasi]

Drops:

• device.logs_channel
• device.vpn_channel
• device.is_managed_by__device
  • device.manages__device
• application.depends_on__application
  • application.is_dependent_on_by__application
• release.release_type(final/draft) in favor of release.is_final (boolean)
• the gateway_download resource
  • image.is_downloaded_by__device
  • device.downloads__image
• the my_application resource
• POSTs to the device and application resource with a text device_type field
• populating the response body with a status code message (eg 'OK')

Changes:

• the user.actor, device.actor, application.actor to return a deferred ({ __id: number; }) instead of a plain number when not $expanded
• the release.contract from a string to a JSON field
• the device.overall_status's
  • offline to disconnected
  • idle to
  • operational when the device is heartbeating, and is either connected to cloudlink or has the vpn configured to be off
  • reduced-functionality when the device has only a heartbeat or is only connected to cloudlink

Replaces:

• device.should_be_running__release with device.is_pinned_on__release
• release.should_be_running_on__device with release.is_pinned_to__device

Adds:

• device.should_be_managed_by__release

Resolves: #1097 Change-type: minor See: https://balena.fibery.io/Work/Project/Server-side-pagination-for-devices-Cycle-3-539

[thgreasi]

@Page- can you expand on your suggestion on making individual commits a bit? Pretty much all of the changes in v7 are already in resin, so this PR was mostly just not copying the respective translations from v6. (ie we already have commits like for dropping the dependent device props on resin) Would you prefer empty commits w/ just the respective title, or would you prefer me to copy-paste v6 as v7 and then doing a commit for each translation that gets removed? If it's the latter one, it would be a mess to also try to have the tests passing on each individual commit.

[thgreasi]

OOooooohhhh on second read I see that you didn't mean having individual commits but just copying the PR's description to the commit's description... Will do, that's easy :)