fix: use create_autospec(Transport) for remaining mock_transport_type instances

Apply reviewer's suggestion consistently across all three test methods
that instantiate mock_transport_type, not just the one originally
flagged.

Author: goingforstudying-ctrl

providers/google/tests/unit/google/cloud/log/test_stackdriver_task_handler.py

@@ -278,7 +278,7 @@ def test_prepare_log_filter_with_custom_resource(self, mock_get_creds_and_projec
     def test_processors_sends_to_transport(self, mock_client, mock_get_creds_and_project_id):
         mock_get_creds_and_project_id.return_value = ("creds", "project_id")
 
-        mock_transport_type = mock.MagicMock()
+        mock_transport_type = mock.create_autospec(Transport)
         with mock.patch("airflow.sdk.log.relative_path_from_logger", return_value="dag/task/1.log"):
             io = StackdriverRemoteLogIO(
                 base_log_folder=self.local_log_location,
@@ -311,7 +311,7 @@ def test_processors_sends_to_transport(self, mock_client, mock_get_creds_and_pro
     def test_processors_skips_non_task_logger(self, mock_client, mock_get_creds_and_project_id):
         mock_get_creds_and_project_id.return_value = ("creds", "project_id")
 
-        mock_transport_type = mock.MagicMock()
+        mock_transport_type = mock.create_autospec(Transport)
         with mock.patch("airflow.sdk.log.relative_path_from_logger", return_value=None):
             io = StackdriverRemoteLogIO(
                 base_log_folder=self.local_log_location,