Add CI jobs for remote k8s deployment test

[dboreham]

The k8s deployment test now supports remote k8s but to run it as a CI job some additional plumbing is needed:

1. Create test machine with k3s installed and configured with SNA hostname.
2. Get kube config from said machine.
3. Wait for cluster ready.
4. Run test with suitable config.
5. Destroy test machine.