### Apache Airflow version

2.1.3 (latest released)

### Operating System

macOS Big Sur 11.3.1

### Versions of Apache Airflow Providers

n/a

### Deployment

Astronomer

### Deployment details

default Astronomer deployment with some test DAGs

### What happened

In the UI for DAGRuns there are checkboxes that allow multiple DAGRuns to be selected.

![image](https://user-images.githubusercontent.com/89415310/133841290-94cda771-9bb3-4677-8530-8c2861525719.png)

Within the Actions menu on this same view, there is a Delete option which allows multiple DAGRuns to be deleted at the same time.

![image](https://user-images.githubusercontent.com/89415310/133841362-3c7fc81d-a823-4f41-8b1d-64be425810ce.png)

Task instance view on the UI does not offer the same option, even though Task Instances can be individually deleted with the trash can button.

![image](https://user-images.githubusercontent.com/89415310/133841442-3fee0930-a6bb-4035-b172-1d10b85f3bf6.png)


### What you expected to happen

I expect that the Task Instances can also be bulk deleted, in the same way that DAGRuns can be.

### How to reproduce

Open up Task Instance and DAGRun views from the Browse tab and compare the options in the Actions dropdown menus.

### Anything else

_No response_

### Are you willing to submit PR?

- [X] 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)

tests/www/views/test_views_tasks.py
app.dag_bag.get_dag('test_tree_view').create_dagrun(
        run_type=DagRunType.SCHEDULED,
        execution_date=DEFAULT_DATE,
        start_date=timezone.utcnow(),
        state=State.RUNNING,
    )
    url = 'dag_details?dag_id=test_tree_view'
    resp = admin_client.get(url, follow_redirects=True)
    params = {'dag_id': 'test_tree_view', 'origin': '/tree?dag_id=test_tree_view'}
    href = f"/trigger?{html.escape(urllib.parse.urlencode(params))}"
    check_content_in_response(href, resp)
def test_dag_details_trigger_origin_graph_view(app, admin_client):
    app.dag_bag.get_dag('test_graph_view').create_dagrun(
        run_type=DagRunType.SCHEDULED,
        execution_date=DEFAULT_DATE,
        start_date=timezone.utcnow(),
        state=State.RUNNING,
    )
    url = 'dag_details?dag_id=test_graph_view'
    resp = admin_client.get(url, follow_redirects=True)
    params = {'dag_id': 'test_graph_view', 'origin': '/graph?dag_id=test_graph_view'}
    href = f"/trigger?{html.escape(urllib.parse.urlencode(params))}"
    check_content_in_response(href, resp)
def test_last_dagruns(admin_client):