🐛 Source Google Ads: Fix error for new customers for incremental events streams (#35664)

airbyte-integrations/connectors/source-google-ads/unit_tests/conftest.py

@@ -55,6 +55,10 @@ def mock_oauth_call(requests_mock):
 def customers(config):
     return [CustomerModel(id=_id, time_zone="local", is_manager_account=False) for _id in config["customer_id"].split(",")]
 
+@pytest.fixture
+def additional_customers(config, customers):
+    return customers + [CustomerModel(id="789", time_zone="local", is_manager_account=False)]
+
 
 @pytest.fixture
 def customers_manager(config):