Feature Request: `ContainerCluster` supports DNS-based control plane endpoint

[ushuz]

Checklist

• I did not find a related open enhancement request.
• I understand that enhancement requests filed in the GitHub repository are by default low priority.
• If this request is time-sensitive, I have submitted a corresponding issue with GCP support.

Describe the feature or resource

There's a new GKE feature that provides a DNS-based control plane endpoint to simplify GKE access [1] [2]:

However, ContainerCluster still lacks support for this.

Additional information

Some related error message:

ERROR: (gcloud.container.clusters.get-credentials) controlPlaneEndpointsConfig.dnsEndpointConfig.allowExternalTraffic is disabled for cluster gke-cluster.

Importance

No response