chore: Update Model Garden SDK to GA version (#13517)

* chore: Update Model Garden SDK to GA version

* update required package version

Author: lizzij

model_garden/gemma/gemma3_deploy.py

@@ -26,7 +26,7 @@ def deploy() -> aiplatform.Endpoint:
     # [START aiplatform_modelgarden_gemma3_deploy]
 
     import vertexai
-    from vertexai.preview import model_garden
+    from vertexai import model_garden
 
     # TODO(developer): Update and un-comment below lines
     # PROJECT_ID = "your-project-id"

model_garden/gemma/models_deploy_options_list.py

@@ -28,7 +28,7 @@ def list_deploy_options(model : str) -> List[types.PublisherModel.CallToAction.D
     # [START aiplatform_modelgarden_models_deployables_options_list]
 
     import vertexai
-    from vertexai.preview import model_garden
+    from vertexai import model_garden
 
     # TODO(developer): Update and un-comment below lines
     # PROJECT_ID = "your-project-id"

model_garden/gemma/models_deployable_list.py

@@ -26,7 +26,7 @@ def list_deployable_models() -> List[str]:
     # [START aiplatform_modelgarden_models_deployables_list]
 
     import vertexai
-    from vertexai.preview import model_garden
+    from vertexai import model_garden
 
     # TODO(developer): Update and un-comment below lines
     # PROJECT_ID = "your-project-id"

model_garden/gemma/requirements.txt

@@ -1 +1 @@
-google-cloud-aiplatform[all]==1.84.0
+google-cloud-aiplatform[all]==1.103.0

model_garden/gemma/test_model_garden_examples.py

@@ -34,7 +34,7 @@ def test_list_deploy_options() -> None:
     assert len(deploy_options) > 0
 
 
-@patch("vertexai.preview.model_garden.OpenModel")
+@patch("vertexai.model_garden.OpenModel")
 def test_gemma3_deploy(mock_open_model: MagicMock) -> None:
     # Mock the deploy response.
     mock_endpoint = aiplatform.Endpoint(endpoint_name="test-endpoint-name")