Fix flaky task-group-row test. (#8221)
Fix flaky task-group-row test. (#8221)

Sometimes a job would be created with a running deployment which made
the increment button disabled.

While I was finding the root cause, I also changed the waitUntil pattern
to match the StepperInput technique which is more resilient to code
changes.
burdandrei/nomad,dvusboy/nomad,hashicorp/nomad,dvusboy/nomad,burdandrei/nomad,burdandrei/nomad,hashicorp/nomad,burdandrei/nomad,hashicorp/nomad,dvusboy/nomad,dvusboy/nomad,dvusboy/nomad,burdandrei/nomad,burdandrei/nomad,dvusboy/nomad,hashicorp/nomad,burdandrei/nomad,hashicorp/nomad,dvusboy/nomad,hashicorp/nomad