feat: adding sparkml notebook

[hyunuk]

This PR enables Neos for SparkML notebook functionality.

Key additions:

• Vertex AI Workbench Instance:
  • Hosts the notebook environment.
  • Initially stopped for cost optimization.
  • Executes a post-startup script upon activation:
  • Downloads the notebook file (ipynb) to the instance.
  • Imports a Dataproc session template for running Dataproc Serverless interactive sessions.
• Storage Bucket: Provides storage for ML models.
• Workbench Service Account (SA): Dedicated SA for the workbench instance.
• IAM Role for Workbench SA: Grants necessary permissions to the SA for function execution.

[review-notebook-app[bot]]

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[hyunuk]

/gcbrun