### Apache Airflow version

2.1.2

### What happened

Task duration view for triggered dags shows all dag runs instead of n last. Changing the number of runs in the `Runs` drop-down menu doesn't change the view. Additionally the chart loads slowly, it show all dag runs.

![screenshot_2022-03-05_170203](https://user-images.githubusercontent.com/7863204/156891332-5e461661-970d-49bf-82a8-5dd1da57bb02.png)
 

### What you expected to happen

The number of shown dag runs is 25 (like for scheduled dags), and the last runs are shown. The number of runs button should allow to increase / decrease the number of shown dag runs (respectively the task times of the dag runs).

### How to reproduce

Trigger a dag multiple (> 25) times. Look at the "Task Duration" chart.

### Operating System

Linux

### Versions of Apache Airflow Providers

_No response_

### Deployment

Official Apache Airflow Helm Chart

### Deployment details

_No response_

### Anything else

_No response_

### Are you willing to submit 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)

"""
        Test that when 'params' exists as a key passed to the default_args dict
        in addition to params being passed explicitly as an argument to the
        dag, that the 'params' key of the default_args dict is merged with the
        dict of the params argument.
        """
        params1 = {"parameter1": 1}
        params2 = {"parameter2": 2}
        dag = models.DAG("test-dag", default_args={"params": params1}, params=params2)
        assert params1["parameter1"] == dag.params["parameter1"]
        assert params2["parameter2"] == dag.params["parameter2"]
    def test_not_none_schedule_with_non_default_params(self):
        """
        Test if there is a DAG with not None schedule_interval and have some params that
        don't have a default value raise a error while DAG parsing
        """
        params = {"param1": Param(type="string")}
        with pytest.raises(AirflowException):
            models.DAG("dummy-dag", params=params)
    def test_dag_invalid_default_view(self):
        """
        Test invalid `default_view` of DAG initialization
        """
        with pytest.raises(AirflowException, match="Invalid values of dag.default_view: only support"):
            models.DAG(dag_id="test-invalid-default_view", default_view="airflow")
    def test_dag_default_view_default_value(self):