Feature: start / stop Sagemaker notebook instances

[codekow]

Is your feature request related to a problem?

There is no way to start or stop Sagemaker notebook instances via CR.

Describe the solution you'd like

apiVersion: sagemaker.services.k8s.aws/v1alpha1
kind: NotebookInstance
spec:
  state: [started,stopped]

Like:

aws sagemaker start-notebook-instance

Describe alternatives you've considered

Run a k8s job to run aws cli