Improve environment variables in GCS system test (#13792)

tests/providers/google/cloud/operators/test_gcs_system_helper.py

@@ -18,15 +18,15 @@
 # under the License.
 import os
 
+from airflow.providers.google.cloud.example_dags.example_gcs import (
+    BUCKET_1,
+    BUCKET_2,
+    PATH_TO_SAVED_FILE,
+    PATH_TO_TRANSFORM_SCRIPT,
+    PATH_TO_UPLOAD_FILE,
+)
 from tests.test_utils.logging_command_executor import LoggingCommandExecutor
 
-BUCKET_1 = os.environ.get("GCP_GCS_BUCKET_1", "test-gcs-example-bucket")
-BUCKET_2 = os.environ.get("GCP_GCS_BUCKET_1", "test-gcs-example-bucket-2")
-
-PATH_TO_UPLOAD_FILE = os.environ.get("GCP_GCS_PATH_TO_UPLOAD_FILE", "test-gcs-example.txt")
-PATH_TO_SAVED_FILE = os.environ.get("GCP_GCS_PATH_TO_SAVED_FILE", "test-gcs-example-download.txt")
-PATH_TO_TRANSFORM_SCRIPT = os.environ.get('GCP_GCS_PATH_TO_TRANSFORM_SCRIPT', 'test.py')
-
 
 class GcsSystemTestHelper(LoggingCommandExecutor):
     @staticmethod