Fix Terraform error "Required 'compute.subnetworks.use'" on Creating Vertex AI Workbench / Notebook

Error waiting to create Instance: Error waiting for Creating Instance: Error code 7, message: Required 'compute.subnetworks.use' permission for

Fix: add the following principal to the network project or current project( depending on how your VPC topology)

service-{project-number}@gcp-sa-notebooks.iam.gserviceaccount.com

And add `Compute Network User` role