Typo in Google Cloud Storage sensor: airflow/providers/google/cloud/sensors/gcs/GCSObjectsWithPrefixExistenceSensor

The word _With_ is spelled incorrectly. It should be: GCSObjects**With**PrefixExistenceSensor

**Apache Airflow version**: 2.0.0
**Environment**:
- **Cloud provider or hardware configuration**: Google Cloud
- **OS** (e.g. from /etc/os-release): Mac OS BigSur






tests/deprecated_classes.py
(
        'airflow.providers.amazon.aws.transfers.dynamodb_to_s3.DynamoDBToS3Operator',
        'airflow.contrib.operators.dynamodb_to_s3.DynamoDBToS3Operator',
    ),
    (
        'airflow.providers.amazon.aws.transfers.hive_to_dynamodb.HiveToDynamoDBOperator',
        'airflow.contrib.operators.hive_to_dynamodb.HiveToDynamoDBOperator',
    ),
    (
        'airflow.providers.amazon.aws.transfers.imap_attachment_to_s3.ImapAttachmentToS3Operator',
        'airflow.contrib.operators.imap_attachment_to_s3_operator.ImapAttachmentToS3Operator',
    ),
    (
        'airflow.providers.amazon.aws.transfers.mongo_to_s3.MongoToS3Operator',
        'airflow.contrib.operators.mongo_to_s3.MongoToS3Operator',
    ),
    (
        'airflow.providers.amazon.aws.transfers.s3_to_sftp.S3ToSFTPOperator',
        'airflow.contrib.operators.s3_to_sftp_operator.S3ToSFTPOperator',
    ),
    (
        'airflow.providers.amazon.aws.transfers.sftp_to_s3.SFTPToS3Operator',
        'airflow.contrib.operators.sftp_to_s3_operator.SFTPToS3Operator',
    ),
    (
        'airflow.providers.amazon.aws.transfers.gcs_to_s3.GCSToS3Operator',
        'airflow.operators.gcs_to_s3.GCSToS3Operator',
    ),
    (
        'airflow.providers.amazon.aws.transfers.google_api_to_s3.GoogleApiToS3Operator',