feat(notebooks): clients for Notebooks API V2 (#8455)

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docs: supports Workbench Instances

https://cloud.google.com/vertex-ai/docs/workbench/reference/rest

PiperOrigin-RevId: 558178233

Source-Link: https://github.com/googleapis/googleapis/commit/ad329f84c0876a6f28026a01be584d3134a4df72

Source-Link: https://github.com/googleapis/googleapis-gen/commit/77e1a0df50f67c0e1c9a9fd768c82f931f601cec
Copy-Tag: eyJwIjoiLmdpdGh1Yi8uT3dsQm90LnlhbWwiLCJoIjoiNzdlMWEwZGY1MGY2N2MwZTFjOWE5ZmQ3NjhjODJmOTMxZjYwMWNlYyJ9

Author: gcf-owl-bot[bot]

internal/.repo-metadata-full.json

@@ -1539,6 +1539,16 @@
     "release_level": "preview",
     "library_type": "GAPIC_AUTO"
   },
+  "cloud.google.com/go/notebooks/apiv2": {
+    "api_shortname": "notebooks",
+    "distribution_name": "cloud.google.com/go/notebooks/apiv2",
+    "description": "Notebooks API",
+    "language": "go",
+    "client_library_type": "generated",
+    "client_documentation": "https://cloud.google.com/go/docs/reference/cloud.google.com/go/notebooks/latest/apiv2",
+    "release_level": "preview",
+    "library_type": "GAPIC_AUTO"
+  },
   "cloud.google.com/go/optimization/apiv1": {
     "api_shortname": "cloudoptimization",
     "distribution_name": "cloud.google.com/go/optimization/apiv1",