### 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)

airflow/models/taskinstance.py
dagrun = _get_previous_dagrun_success()
            if dagrun is None:
                return None
            return timezone.coerce_datetime(dagrun.start_date)
        
        class VariableAccessor:
            """
            Wrapper around Variable. This way you can get variables in
            templates by using ``{{ var.value.variable_name }}`` or
            ``{{ var.value.get('variable_name', 'fallback') }}``.
            """
            def __init__(self):
                self.var = None
            def __getattr__(
                self,
                item: str,
            ):
                self.var = Variable.get(item)
                return self.var
            def __repr__(self):
                return str(self.var)
            @staticmethod
            def get(
                item: str,
                default_var: Any = Variable._Variable__NO_DEFAULT_SENTINEL,
            ):
                """Get Airflow Variable value"""
                return Variable.get(item, default_var=default_var)
        class VariableJsonAccessor: