Switch to Kubernetes/Kueue service backend

Summary

This release replaces Cloud Run infrastructure with Kubernetes/Kueue infrastructure and sets up the service to deploy to it.

Contents (#16)

Operations

• Replace terraform configuration with terraform-octue-twined and terraform-octue-twined-static modules
• Use simpler dockerfile
• Specify event store, service registry, and storage bucket output
• Add new Kueue deployment workflows
• Update workflows

Dependencies

• Use rc-kueue branch of octue

Testing

• Test deployment with parallel questions