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.operators.google_api_to_s3_transfer.GoogleApiToS3Transfer',
    ),
    (
        'airflow.providers.amazon.aws.transfers.redshift_to_s3.RedshiftToS3Operator',
        'airflow.operators.redshift_to_s3_operator.RedshiftToS3Transfer',
    ),
    (
        'airflow.providers.amazon.aws.transfers.s3_to_redshift.S3ToRedshiftOperator',
        'airflow.operators.s3_to_redshift_operator.S3ToRedshiftTransfer',
    ),
    (
        'airflow.providers.apache.hive.transfers.vertica_to_hive.VerticaToHiveOperator',
        'airflow.contrib.operators.vertica_to_hive.VerticaToHiveTransfer',
    ),
    (
        'airflow.providers.apache.druid.transfers.hive_to_druid.HiveToDruidOperator',
        'airflow.operators.hive_to_druid.HiveToDruidTransfer',
    ),
    (
        'airflow.providers.apache.hive.transfers.hive_to_mysql.HiveToMySqlOperator',
        'airflow.operators.hive_to_mysql.HiveToMySqlTransfer',
    ),
    (
        'airflow.providers.apache.hive.transfers.mysql_to_hive.MySqlToHiveOperator',
        'airflow.operators.mysql_to_hive.MySqlToHiveTransfer',
    ),
    (
        'airflow.providers.apache.hive.transfers.s3_to_hive.S3ToHiveOperator',
        'airflow.operators.s3_to_hive_operator.S3ToHiveTransfer',
    ),