[ingvarch]

What changes

Nothing changes on screen. The kind of a batch queue now has one name in the code: nomad.QueueKind, with the values QueueFifo and QueueDynamic. Before, the queue screen compared strings in two spellings each ("dynamic priority", "dynamic_priority", and the value of api.BatchQueueTypeDynamic), and internal/ui imported github.com/hashicorp/nomad/api for that one constant.

• internal/nomad turns the API's queue type into a QueueKind in one place, kindOf, next to queueOf for node pools.
• QueueWorkload.QueueType and NodePool.Queue are QueueKind.
• queuePage.dynamic() compares with nomad.QueueDynamic only.
• A new test, TestUI_DoesNotImportTheNomadAPI, fails when a non-test file in internal/ui imports github.com/hashicorp/nomad/api. The cluster's types reach the screens only through internal/nomad.

Issues

Closes #203

Checklist

• The test for this change was written first and failed
• make check is green
• The guide in docs/ is updated if users see a difference
• The title is a conventional commit: feat(ui): ..., fix(nomad): ...