### 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(
            dag_id='test_render_k8s_pod_yaml',
            run_id='test_run_id',
            task_id='op1',
            execution_date=DEFAULT_DATE,
        )
        expected_pod_spec = {
            'metadata': {
                'annotations': {
                    'dag_id': 'test_render_k8s_pod_yaml',
                    'execution_date': '2016-01-01T00:00:00+00:00',
                    'task_id': 'op1',
                    'try_number': '1',
                },
                'labels': {
                    'airflow-worker': 'worker-config',
                    'airflow_version': version,
                    'dag_id': 'test_render_k8s_pod_yaml',
                    'execution_date': '2016-01-01T00_00_00_plus_00_00',
                    'kubernetes_executor': 'True',
                    'task_id': 'op1',