### Description

[MongoSensor](https://airflow.apache.org/docs/apache-airflow-providers-mongo/2.1.0/_api/airflow/providers/mongo/sensors/mongo/index.html) does not have a DB in the Python API. It has to use the schema from Mongo Connection. 



### Use case/motivation

In mongo, the schema is usually the Auth DB and not the data DB. The user will not have the option to switch DB at the DAG level.

### Related issues

_No response_

### Are you willing to submit a PR?

- [X] 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)

airflow/providers/mongo/sensors/mongo.py
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from airflow.providers.mongo.hooks.mongo import MongoHook
from airflow.sensors.base import BaseSensorOperator
class MongoSensor(BaseSensorOperator):