release pipelines use cluster-1, rather than topgun gke cluster

[cirocosta]

Hey,

A little bit before getting concourse/concourse#4643 in, we got a cluster (topgun) created in GKE, having node pools that make more sense than before (high cpu, with autoscaling set).

It turns out that we never changed the cluster that k8s-topgun target in the release pipelines though.

As a result, we're now with the clusters, while in practice, we could have just one.

Thanks!

(not necessarily related, but could be done together w/ concourse/prod#36)

[jomsie]

Wow, so the new GKE cluster is not being used by anything? Good snag for sure!

[github-actions]

This issue has had no activity for a while. It has been labeled stale, and will be closed in one week.