Support updated GKE auth system

[rainest]

Per https://cloud.google.com/blog/products/containers-kubernetes/kubectl-auth-changes-in-gke the 1.25 release will begin requiring a kubectl plugin to use kubectl with GKE. This likely requires changes to client-go usage (to use the same plugin system used by the kubectl plugin) when not using in-cluster configuration.

We need to:

• Determine how to use the plugin in KTF's kubectl invocations, or if not possible try to warn about its absence.
• Determine if we need to make changes to client-go usage.
• Develop recommendations for downstream, which will probably need to make similar changes.

[mflendrich]

won't fix - seems that our testenv does not require this to be successful and it's unclear what the benefit of this change would be.

[mflendrich]

further work

• Log the parameters of the created GKE cluster #517