[CI] Test Charts against Kubernetes 1.22

Summary

As part of gitlab-org&6883 (closed), we'll need to test the Operator against Kubernetes 1.22.

For the moment we need to follow Deploy to a Kubernetes cluster with cluster certificates (DEPRECATED) to set up Kubernetes deployment targets.

Acceptance criteria

• Provision a new cluster for Kubernetes 1.22
• Add CI jobs to test against the new cluster
• Project is configured use proper authentication for 1.22 cluster