### Body

There are some use cases where users want to trigger new DAG run as soon as one finished. This is a request I've seen several times with some variations (for example like this [Stackoverflow question](https://stackoverflow.com/q/75623153/14624409)) but the basic request is the same.

The workaround users do to get such functionality is place `TriggerDagRunOperator` as last task of their DAG invoking the same DAG:

```
from datetime import datetime

from airflow import DAG
from airflow.operators.empty import EmptyOperator
from airflow.operators.trigger_dagrun import TriggerDagRunOperator

with DAG(
    dag_id="example",
    start_date=datetime(2023, 1, 1,),
    catchup=False,
    schedule=None,
) as dag:
    task = EmptyOperator(task_id="first")
    trigger = TriggerDagRunOperator(
        task_id="trigger",
        trigger_dag_id="example",
    )

    task >> trigger

```

As you can see this works nicely:
![Screenshot 2023-03-03 at 14 20 51](https://user-images.githubusercontent.com/45845474/222718862-dfde8a41-24b6-4991-b318-b7f9784514f6.png)

My suggestion is to add first class support for this use case, so the above example will be changed to:

```

from datetime import datetime

from airflow import DAG
from airflow.operators.empty import EmptyOperator
from airflow.operators.trigger_dagrun import TriggerDagRunOperator

with DAG(
    dag_id="example",
    start_date=datetime(2023, 1, 1,),
    catchup=False,
    schedule="@continues",
) as dag:
    task = EmptyOperator(task_id="first")
```

I guess it won't exactly be `"@continues"` but more likely new [ScheduleArg](https://github.com/apache/airflow/blob/8b8552f5c4111fe0732067d7af06aa5285498a79/airflow/models/dag.py#L127) type but I show it like that just for simplification of the idea.

### Committer

- [X] I acknowledge that I am a maintainer/committer of the Apache Airflow project.
DataInterval(DEFAULT_DATE, DEFAULT_DATE + timedelta(days=2)),
            id="modern",
        ),
        pytest.param(
            DEFAULT_DATE,
            None,
            None,
            DataInterval(DEFAULT_DATE, DEFAULT_DATE + timedelta(days=1)),
            id="legacy",
        ),
    ],
)
def test_get_next_data_interval(
    logical_date,
    data_interval_start,
    data_interval_end,
    expected_data_interval,
):
    dag = DAG(dag_id="test_get_next_data_interval", schedule="@daily")
    dag_model = DagModel(
        dag_id="test_get_next_data_interval",
        next_dagrun=logical_date,
        next_dagrun_data_interval_start=data_interval_start,
        next_dagrun_data_interval_end=data_interval_end,
    )
    assert dag.get_next_data_interval(dag_model) == expected_data_interval
@pytest.mark.parametrize(
    ("dag_date", "tasks_date", "restrict"),
    [
        [