### Description

Currently some code in RDS Operators use boto waiters and some uses a custom `_await_status`, the former is preferred over the later (waiters are vetted code provided by the boto sdk, they have features like exponential backoff, etc). See [this discussion thread](https://github.com/apache/airflow/pull/27076#discussion_r997325535) for more details/context.

### Use case/motivation

_No response_

### Related issues

_No response_

### Are you willing to submit a PR?

- [ ] 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)

@classmethod
    def setup_class(cls):
        cls.dag = DAG("test_dag", default_args={"owner": "airflow", "start_date": DEFAULT_DATE})
        cls.hook = RdsHook(aws_conn_id=AWS_CONN, region_name="us-east-1")
    @classmethod
    def teardown_class(cls):