The GCStoGCS operator using the _replace=False_ flag and specifying _source_object != destination_object_, will not work properly, because it is comparing [apples](https://github.com/apache/airflow/blob/main/airflow/providers/google/cloud/transfers/gcs_to_gcs.py#L351) with [pears](https://github.com/apache/airflow/blob/0dd70de9492444d52e0afaadd7a510fc8a95369c/airflow/providers/google/cloud/transfers/gcs_to_gcs.py#L357).

Cause: the _prefix_ in the _pears_ case needs to be calculated from the _destination_object_, however, it is coming from the _source_object_.




tests/providers/google/cloud/transfers/test_gcs_to_gcs.py
mock_hook.return_value.list.return_value = SOURCE_FILES_LIST
        operator = GCSToGCSOperator(
            task_id=TASK_ID,
            source_bucket=TEST_BUCKET,
            source_object=SOURCE_OBJECT_NO_WILDCARD,
            destination_bucket=None,
            destination_object=DESTINATION_OBJECT_PREFIX,
        )
        with mock.patch.object(operator.log, 'warning') as mock_warn:
            operator.execute(None)
            mock_warn.assert_called_once_with(
                'destination_bucket is None. Defaulting it to source_bucket (%s)', TEST_BUCKET
            )
            assert operator.destination_bucket == operator.source_bucket
    
    @mock.patch('airflow.providers.google.cloud.transfers.gcs_to_gcs.GCSHook')
    def test_executes_with_empty_source_objects(self, mock_hook):
        operator = GCSToGCSOperator(
            task_id=TASK_ID, source_bucket=TEST_BUCKET, source_objects=SOURCE_OBJECTS_NO_FILE
        )
        operator.execute(None)
        mock_hook.return_value.list.assert_called_once_with(TEST_BUCKET, prefix='', delimiter=None)
    @mock.patch('airflow.providers.google.cloud.transfers.gcs_to_gcs.GCSHook')
    def test_raises_exception_with_two_empty_list_inside_source_objects(self, mock_hook):