### 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()
        patcher = mock.patch.object(ti, 'render_k8s_pod_yaml', autospec=True)
        fake_spec = {"ermagawds": "pods"}
        session = mock.Mock()
        with patcher as render_k8s_pod_yaml:
            rtif_get_k8s_pod_yaml.return_value = fake_spec
            assert ti.get_rendered_k8s_spec(session) == fake_spec
            rtif_get_k8s_pod_yaml.assert_called_once_with(ti, session=session)
            render_k8s_pod_yaml.assert_not_called()
            
            rtif_get_k8s_pod_yaml.return_value = None
            render_k8s_pod_yaml.return_value = fake_spec
            assert ti.get_rendered_k8s_spec(session) == fake_spec
            render_k8s_pod_yaml.assert_called_once()
    def test_set_state_up_for_retry(self, create_task_instance):
        ti = create_task_instance(state=State.RUNNING)
        start_date = timezone.utcnow()
        ti.start_date = start_date
        ti.set_state(State.UP_FOR_RETRY)
        assert ti.state == State.UP_FOR_RETRY
        assert ti.start_date == start_date, "Start date should have been left alone"
        assert ti.start_date < ti.end_date
        assert ti.duration > 0
    def test_refresh_from_db(self, create_task_instance):