Replace Jupyterhub stack with the new notebook controller architecture without losing any previous notebook data.

The script will do the following tasks:

• Get all the Jupyterhub running notebooks in rhods-notebooks namespace.
• Create a kubeflow notebook object per JH notebook:
  • Notebook object + AuthZ RBAC
  • PVC
  • Configmap
  • Secret
  • GPU resources
  • GPU tolerations

• Shut down JH notebooks.
• Controller notebooks should start gracefully mounting old pvcs in new notebooks.
• Remove Jupyterhub stack:
  • Jupyterhub DC.
  • Traefik.
  • Database (including CRO).
  • JH Alerts and monitoring rules.

Out of scope: The notebook controller will be already deployed.