fix: Remove unnecessary get caller identity call (#3960)

Author: evakravi

src/sagemaker/jumpstart/factory/estimator.py

@@ -396,6 +396,7 @@ def _add_role_to_kwargs(kwargs: JumpStartEstimatorInitKwargs) -> JumpStartEstima
         field_name="role",
         field_val=kwargs.role,
         sagemaker_session=kwargs.sagemaker_session,
+        default_value=kwargs.role,
     )
 
     return kwargs

src/sagemaker/jumpstart/factory/model.py

@@ -127,6 +127,7 @@ def _add_role_to_kwargs(kwargs: JumpStartModelInitKwargs) -> JumpStartModelInitK
         field_name="role",
         field_val=kwargs.role,
         sagemaker_session=kwargs.sagemaker_session,
+        default_value=kwargs.role,
     )
 
     return kwargs