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.apache.sqoop.hooks.sqoop.SqoopHook',
        'airflow.contrib.hooks.sqoop_hook.SqoopHook',
    ),
    (
        'airflow.providers.apache.druid.hooks.druid.DruidHook',
        'airflow.hooks.druid_hook.DruidHook',
    ),
    (
        'airflow.providers.apache.druid.hooks.druid.DruidDbApiHook',
        'airflow.hooks.druid_hook.DruidDbApiHook',
    ),
    (
        'airflow.providers.apache.hdfs.hooks.hdfs.HDFSHookException',
        'airflow.hooks.hdfs_hook.HDFSHookException',
    ),
    (
        'airflow.providers.apache.hdfs.hooks.hdfs.HDFSHook',
        'airflow.hooks.hdfs_hook.HDFSHook',
    ),
    (
        'airflow.providers.apache.hive.hooks.hive.HiveMetastoreHook',
        'airflow.hooks.hive_hooks.HiveMetastoreHook',
    ),
    (
        'airflow.providers.apache.hive.hooks.hive.HiveCliHook',
        'airflow.hooks.hive_hooks.HiveCliHook',
    ),
    (