### 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)

self,
        *,
        db_type: str,
        db_identifier: str,
        db_snapshot_identifier: str,
        tags: Sequence[TagTypeDef] | None = None,
        wait_for_completion: bool = True,
        aws_conn_id: str = "aws_conn_id",
        **kwargs,
    ):
        super().__init__(aws_conn_id=aws_conn_id, **kwargs)
        self.db_type = RdsDbType(db_type)
        self.db_identifier = db_identifier
        self.db_snapshot_identifier = db_snapshot_identifier
        self.tags = tags or []
        self.wait_for_completion = wait_for_completion
    def execute(self, context: Context) -> str:
        self.log.info(