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.operators.emr_add_steps.EmrAddStepsOperator',
        'airflow.contrib.operators.emr_add_steps_operator.EmrAddStepsOperator',
    ),
    (
        'airflow.providers.amazon.aws.operators.emr_create_job_flow.EmrCreateJobFlowOperator',
        'airflow.contrib.operators.emr_create_job_flow_operator.EmrCreateJobFlowOperator',
    ),
    (
        'airflow.providers.amazon.aws.operators.emr_terminate_job_flow.EmrTerminateJobFlowOperator',
        'airflow.contrib.operators.emr_terminate_job_flow_operator.EmrTerminateJobFlowOperator',
    ),
    (
        'airflow.providers.amazon.aws.operators.s3_copy_object.S3CopyObjectOperator',
        'airflow.contrib.operators.s3_copy_object_operator.S3CopyObjectOperator',
    ),
    (
        'airflow.providers.amazon.aws.operators.s3_delete_objects.S3DeleteObjectsOperator',
        'airflow.contrib.operators.s3_delete_objects_operator.S3DeleteObjectsOperator',
    ),
    (
        'airflow.providers.amazon.aws.operators.s3_list.S3ListOperator',
        'airflow.contrib.operators.s3_list_operator.S3ListOperator',
    ),
    (
        'airflow.providers.amazon.aws.operators.sagemaker_base.SageMakerBaseOperator',
        'airflow.contrib.operators.sagemaker_base_operator.SageMakerBaseOperator',
    ),
    (
        'airflow.providers.amazon.aws.operators.sagemaker_endpoint_config.SageMakerEndpointConfigOperator',
        'airflow.contrib.operators.sagemaker_endpoint_config_operator.SageMakerEndpointConfigOperator',