fix: update get_execution_role to directly return the ExecutionRoleArn if it presents in the resource metadata file

For commit: aws/sagemaker-python-sdk-staging@b9df334

Author: zhaoqizqwang

sagemaker-core/src/sagemaker/core/helper/session_helper.py

@@ -330,16 +330,16 @@ def get_caller_identity_arn(self):
                 user_profile_name = metadata.get("UserProfileName")
                 execution_role_arn = metadata.get("ExecutionRoleArn")
             try:
+                # find execution role from the metadata file if present
+                if execution_role_arn is not None:
+                    return execution_role_arn
+
                 if domain_id is None:
                     instance_desc = self.sagemaker_client.describe_notebook_instance(
                         NotebookInstanceName=instance_name
                     )
                     return instance_desc["RoleArn"]
 
-                # find execution role from the metadata file if present
-                if execution_role_arn is not None:
-                    return execution_role_arn
-
                 user_profile_desc = self.sagemaker_client.describe_user_profile(
                     DomainId=domain_id, UserProfileName=user_profile_name
                 )