introduce new Unhealthy status for device

[vdelendik]

during the automation runs we might detect device status when it is available for remote manual usage but can't be used by automation, for example: too low disk space, some network/wifi connectivity issues etc.
in this case we wanna to have:

1. new status Unhealthy (5) which allow to do remote connect but without possibility to execute test automation (1 - offline; 2 - unauthorized; 3 - use, 4 - connected)
   Note: exact state name TBD
2. api end-point to change the status (take a look to deliver enhanced api to manipulate devices #300 howto change status)
3. change UI to highlight this status. Using from Unauthorized should be good enough but with ability to use device manually.

[ignacionar]

Done: #798

Changes are available in public.ecr.aws/zebrunner/stf:2.6-beta1

[vdelendik]

closing, @dhreben - find a way to validate. ideally I'd like to see api call to change state to unhalthy

[dhreben]

It will be verified after the execution #825

[dhreben]

Verified.

Curl -X PUT -H "Authorization: Bearer <token>" -H 'Content-Type: application/json' -d '{ "device": { "status": "Unhealthy" } }' https://demo.zebrunner.farm/api/v1/devices/<udid> | jq .