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.hive.operators.hive_stats.HiveStatsCollectionOperator',
        'airflow.operators.hive_stats_operator.HiveStatsCollectionOperator',
    ),
    (
        'airflow.providers.apache.pig.operators.pig.PigOperator',
        'airflow.operators.pig_operator.PigOperator',
    ),
    (
        'airflow.providers.microsoft.azure.operators.adls_list.AzureDataLakeStorageListOperator',
        'airflow.contrib.operators.adls_list_operator.AzureDataLakeStorageListOperator',
    ),
    (
        'airflow.providers.microsoft.azure.operators'
        '.azure_container_instances.AzureContainerInstancesOperator',
        'airflow.contrib.operators.azure_container_instances_operator.AzureContainerInstancesOperator',
    ),
    (
        'airflow.providers.microsoft.azure.operators.azure_cosmos.AzureCosmosInsertDocumentOperator',
        'airflow.contrib.operators.azure_cosmos_operator.AzureCosmosInsertDocumentOperator',
    ),
    (
        'airflow.providers.microsoft.azure.operators.wasb_delete_blob.WasbDeleteBlobOperator',
        'airflow.contrib.operators.wasb_delete_blob_operator.WasbDeleteBlobOperator',
    ),
    (
        'airflow.providers.amazon.aws.operators.ecs.ECSOperator',
        'airflow.contrib.operators.ecs_operator.ECSOperator',
    ),
    (