fix: allow custom image when calling deploy or create_model with estimator

Author: mmcclean-aws

src/sagemaker/pytorch/estimator.py

@@ -175,7 +175,7 @@ def create_model(
             code_location=self.code_location,
             py_version=self.py_version,
             framework_version=self.framework_version,
-            image=self.image_name,
+            image=kwargs["image"] if "image" in kwargs else self.image_name,
             model_server_workers=model_server_workers,
             sagemaker_session=self.sagemaker_session,
             vpc_config=self.get_vpc_config(vpc_config_override),