### 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 assigning Operators to Dags, including deferred assignment
        """
        with dag_maker('dag') as dag:
            pass
        with dag_maker('dag2') as dag2:
            pass
        op = DummyOperator(task_id='op_1')
        
        assert not op.has_dag()
        with pytest.raises(AirflowException):
            getattr(op, 'dag')
        
        with pytest.raises(TypeError):
            op.dag = 1
        op.dag = dag
        
        with pytest.raises(AirflowException):
            op.dag = dag2
        
        op.dag = dag
        assert op.dag is dag
        assert op in dag.tasks
    def test_infer_dag(self, create_dummy_dag):