[gcp] Enable new stackdriver Kubernetes agents on GKE

[jlewi]

To enable the new agents I think we need to set the following in our cluster DM config.

loggingService: logging.googleapis.com/kubernetes
monitoringService: monitoring.googleapis.com/kubernetes

We can verify its enabled in the Cloud console where it should say

Stackdriver Logging	
Enabled v2(beta)
Stackdriver Monitoring	
Enabled v2(beta)

[jlewi]

I think this might need a little bit more work.

It looks like its guarded by gkeApiVersion

kubeflow/deployment/gke/deployment_manager_configs/cluster.jinja

Line 76 in 2e03ae9

{% if properties['gkeApiVersion'] == 'v1beta1' %}

We just need to test it and then maybe document it.

[chrisheecho]

/remove-priority p1

[jlewi]

/priority p1

[jlewi]

It looks like the feature is still in beta.
https://cloud.google.com/monitoring/kubernetes-engine/

Beta features are only available through the v1beta1 API
https://cloud.google.com/kubernetes-engine/docs/reference/api-organization#beta

So we need to use that API to create/modify the cluster.