### Description

In Airflow UI. If we go to Browse --> DAG Runs, then DAG Runs view will be displayed.

Table contains a lot of insightful values likes DAG execution date, Start date, end date, Dag config etc

Request to add DAG duration column in the same table.
DAG Duration i.e. DAG end_date timestamp  - DAG start_date timestamp

### Use case/motivation

Analytics purpose of knowing DAG duration at all DAGs level. So that I can easily find out which DAG  have least and max duration.

### Related issues

Checked open issues. There aren't any

### Are you willing to submit a PR?

- [ ] Yes I am willing to submit a PR!

### Code of Conduct

- [X] I agree to follow this project's [Code of Conduct](https://github.com/apache/airflow/blob/main/CODE_OF_CONDUCT.md)

airflow/www/views.py
"""Returns appropriate permission name depending on request method name."""
        if request:
            action_name = request.view_args.get("name")
            _, method_name = request.url_rule.endpoint.rsplit(".", 1)
            if method_name == 'action' and action_name:
                return self.class_permission_name_mapping.get(action_name, self._class_permission_name)
            if method_name:
                return self.class_permission_name_mapping.get(method_name, self._class_permission_name)
        return self._class_permission_name
    @class_permission_name.setter
    def class_permission_name(self, name):
        self._class_permission_name = name
class CustomUserLDAPModelView(MultiResourceUserMixin, UserLDAPModelView):
    """Customize permission names for FAB's builtin UserLDAPModelView."""
    pass
class CustomUserOAuthModelView(MultiResourceUserMixin, UserOAuthModelView):
    """Customize permission names for FAB's builtin UserOAuthModelView."""
    pass
class CustomUserOIDModelView(MultiResourceUserMixin, UserOIDModelView):
    """Customize permission names for FAB's builtin UserOIDModelView."""
    pass
class CustomUserRemoteUserModelView(MultiResourceUserMixin, UserRemoteUserModelView):
    """Customize permission names for FAB's builtin UserRemoteUserModelView."""
    pass