Final steps migration to CNCF infrastructure

[inteon]

This issue tracks the progress of the migration to CNCF infrastructure.

• moved the GCP cert-manager-release project to the CNCF GCP organisation
• clean-room deploy of cert-manager testing infrastructure in new GCP projects
• bug and stability fixes
• via CNCF service desk: point registar to new CloudDNS instances on GCP
• install triage-party tool
• migrate Netlify
• tear-down old testing infrastructure (https://github.com/jetstack/terraform-jetstack-build-infra/pull/36)

[maelvls]

Can we close this ticket? Or do we still need to do something?

I think we have decided we want to continue using http://triage.infra.cert-manager.io/

[inteon]

The migration has been completed (ofc. further improvements are possible and desirable, but will be tracked separately). 🥳

[maelvls]

Hey, about the migration of the Kubernetes clusters, is the documentation up to date regarding the Kubernetes name and GCP project name, e.g., in https://github.com/cert-manager/testing/tree/master/prow?