Migrate blueprints/data-solutions/vertex-mlops to google_workbench_instance

[wiktorn]

│ Warning: Deprecated Resource
│ 
│   with module.test.google_notebooks_instance.playground,
│   on [...]/cloud-foundation-fabric/blueprints/data-solutions/vertex-mlops/vertex.tf line 82, in resource "google_notebooks_instance" "playground":
│   82: resource "google_notebooks_instance" "playground" {
│ 
│ `google_notebook_instance` is deprecated and will be removed in a future major release. Use `google_workbench_instance` instead.
│ 
│ (and one more similar warning elsewhere)