refactor: pass failure_node to get_non_system_nodes function

-e
Signed-off-by: machichima <[email protected]>

Author: machichima

flytekit/remote/entities.py

@@ -730,9 +730,7 @@ def promote_from_model(
         tasks: Optional[Dict[Identifier, FlyteTask]] = None,
         node_launch_plans: Optional[Dict[Identifier, launch_plan_models.LaunchPlanSpec]] = None,
     ) -> FlyteWorkflow:
-        base_model_non_system_nodes = cls.get_non_system_nodes(base_model.nodes) + (
-            [base_model.failure_node] if base_model.failure_node is not None else []
-        )
+        base_model_non_system_nodes = cls.get_non_system_nodes(base_model.nodes + [base_model.failure_node])
 
         node_map = {}
         converted_sub_workflows = {}