### 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.log.info("Starting export task %s for snapshot %s", self.export_task_identifier, self.source_arn)
        start_export = self.hook.conn.start_export_task(
            ExportTaskIdentifier=self.export_task_identifier,
            SourceArn=self.source_arn,
            S3BucketName=self.s3_bucket_name,
            IamRoleArn=self.iam_role_arn,
            KmsKeyId=self.kms_key_id,
            S3Prefix=self.s3_prefix,
            ExportOnly=self.export_only,
        )
        if self.wait_for_completion:
            self._await_status(
                "export_task",
                self.export_task_identifier,
                wait_statuses=["starting", "in_progress"],
                ok_statuses=["complete"],
                error_statuses=["canceling", "canceled"],
            )
        return json.dumps(start_export, default=str)
class RdsCancelExportTaskOperator(RdsBaseOperator):
    """
    Cancels an export task in progress that is exporting a snapshot to Amazon S3
    .. seealso::
        For more information on how to use this operator, take a look at the guide:
        :ref:`howto/operator:RdsCancelExportTaskOperator`
    :param export_task_identifier: The identifier of the snapshot export task to cancel
    :param wait_for_completion:  If True, waits for DB snapshot export to cancel. (default: True)
    """
    template_fields = ("export_task_identifier",)
    def __init__(