### 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)

RdsStartDbOperator,
    RdsStartExportTaskOperator,
    RdsStopDbOperator,
)
from airflow.utils import timezone
DEFAULT_DATE = timezone.datetime(2019, 1, 1)
AWS_CONN = "amazon_default"
DB_INSTANCE_NAME = "my-db-instance"
DB_CLUSTER_NAME = "my-db-cluster"
DB_INSTANCE_SNAPSHOT = "my-db-instance-snap"
DB_CLUSTER_SNAPSHOT = "my-db-cluster-snap"
DB_INSTANCE_SNAPSHOT_COPY = "my-db-instance-snap-copy"
DB_CLUSTER_SNAPSHOT_COPY = "my-db-cluster-snap-copy"
EXPORT_TASK_NAME = "my-db-instance-snap-export"
EXPORT_TASK_SOURCE = "arn:aws:rds:es-east-1::snapshot:my-db-instance-snap"
EXPORT_TASK_ROLE_NAME = "MyRole"
EXPORT_TASK_ROLE_ARN = "arn:aws:iam:es-east-1::role/MyRole"
EXPORT_TASK_KMS = "arn:aws:kms:es-east-1::key/*****-****-****-****-********"
EXPORT_TASK_BUCKET = "my-exports-bucket"
SUBSCRIPTION_NAME = "my-db-instance-subscription"
SUBSCRIPTION_TOPIC = "arn:aws:sns:us-east-1::MyTopic"
def _create_db_instance(hook: RdsHook):
    hook.conn.create_db_instance(
        DBInstanceIdentifier=DB_INSTANCE_NAME,
        DBInstanceClass="db.m4.large",
        Engine="postgres",
    )
    if not hook.conn.describe_db_instances()["DBInstances"]:
        raise ValueError("AWS not properly mocked")
def _create_db_cluster(hook: RdsHook):