### 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
"""
        Test that get_previous_start_date() can handle TaskInstance with no start_date.
        """
        with dag_maker("test_get_previous_start_date_none", schedule_interval=None) as dag:
            task = DummyOperator(task_id="op")
        day_1 = DEFAULT_DATE
        day_2 = DEFAULT_DATE + datetime.timedelta(days=1)
        
        
        
        dagrun_1 = dag_maker.create_dagrun(
            execution_date=day_1,
            state=State.RUNNING,
            run_type=DagRunType.MANUAL,
        )
        dagrun_2 = dag.create_dagrun(
            execution_date=day_2,
            state=State.RUNNING,
            run_type=DagRunType.MANUAL,
        )
        ti_1 = dagrun_1.get_task_instance(task.task_id)
        ti_2 = dagrun_2.get_task_instance(task.task_id)
        ti_1.task = task
        ti_2.task = task
        assert ti_2.get_previous_start_date() == ti_1.start_date
        assert ti_1.start_date is None
    def test_pendulum_template_dates(self, create_task_instance):