### Apache Airflow version

main (development)

### Operating System

macOS 11.5.2

### Versions of Apache Airflow Providers

_No response_

### Deployment

Virtualenv installation

### Deployment details

_No response_

### What happened

If your first try fails and you have retries enabled, the subsequent tries skip right to the final `next_method(**next_kwargs)` instead of starting with `execute` again.

### What you expected to happen

Like we reset things like start date, we should wipe `next_method` and `next_kwargs` so we can retry the task from the beginning.

### How to reproduce

_No response_

### 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/models/test_taskinstance.py
ti = create_task_instance()
        params = {"override": False}
        dag_run = ti.dag_run
        ti.overwrite_params_with_dag_run_conf(params, dag_run)
        assert params["override"] is False
    @patch('airflow.models.taskinstance.send_email')
    def test_email_alert(self, mock_send_email, dag_maker):
        with dag_maker(dag_id='test_failure_email'):
            task = BashOperator(task_id='test_email_alert', bash_command='exit 1', email='to')
        ti = dag_maker.create_dagrun(execution_date=timezone.utcnow()).task_instances[0]
        ti.task = task
        try:
            ti.run()
        except AirflowException:
            pass
        (email, title, body), _ = mock_send_email.call_args
        assert email == 'to'
        assert 'test_email_alert' in title
        assert 'test_email_alert' in body
        assert 'Try 1' in body
    @conf_vars(
        {
            ('email', 'subject_template'): '/subject/path',
            ('email', 'html_content_template'): '/html_content/path',
        }
    )
    @patch('airflow.models.taskinstance.send_email')
    def test_email_alert_with_config(self, mock_send_email, dag_maker):