### 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)

"""
    Starts an export of a snapshot to Amazon S3. The provided IAM role must have access to the S3 bucket.
    .. seealso::
        For more information on how to use this operator, take a look at the guide:
        :ref:`howto/operator:RdsStartExportTaskOperator`
    :param export_task_identifier: A unique identifier for the snapshot export task.
    :param source_arn: The Amazon Resource Name (ARN) of the snapshot to export to Amazon S3.
    :param s3_bucket_name: The name of the Amazon S3 bucket to export the snapshot to.
    :param iam_role_arn: The name of the IAM role to use for writing to the Amazon S3 bucket.
    :param kms_key_id: The ID of the Amazon Web Services KMS key to use to encrypt the snapshot.
    :param s3_prefix: The Amazon S3 bucket prefix to use as the file name and path of the exported snapshot.
    :param export_only: The data to be exported from the snapshot.
    :param wait_for_completion:  If True, waits for the DB snapshot export to complete. (default: True)
    """
    template_fields = (
        "export_task_identifier",
        "source_arn",
        "s3_bucket_name",
        "iam_role_arn",
        "kms_key_id",
        "s3_prefix",
        "export_only",
    )
    def __init__(