### Body

In the Pools UI we don't show the description column though we do have it:
https://github.com/apache/airflow/blob/99eeb84c820c8a380721e5d40f5917a01616b943/airflow/models/pool.py#L56

and we have it in the API:
https://github.com/apache/airflow/pull/19841

The task:
Expose the column in the UI
![Screenshot 2023-10-04 at 17 08 05](https://github.com/apache/airflow/assets/45845474/4ed7ed5b-8d42-4a72-b271-07d07066f914)


### Committer

- [X] I acknowledge that I am a maintainer/committer of the Apache Airflow project.
"mapped_states": mapped_states,
                }
            return [get_mapped_group_summary(run_id, tis) for run_id, tis in mapped_tis.items()]
        
        if task_group.group_id is None:
            return {
                "id": task_group.group_id,
                "label": task_group.label,
                "children": children,
                "instances": [],
            }
        if next(task_group.iter_mapped_task_groups(), None) is not None:
            return {
                "id": task_group.group_id,
                "label": task_group.label,
                "children": children,
                "tooltip": task_group.tooltip,
                "instances": get_mapped_group_summaries(),
                "is_mapped": True,
            }
        group_summaries = [get_summary(dr) for dr in dag_runs]
        return {
            "id": task_group.group_id,
            "label": task_group.label,
            "children": children,
            "tooltip": task_group.tooltip,
            "instances": group_summaries,
        }
    return task_group_to_grid(dag.task_group)
def get_key_paths(input_dict):