This stage does the following: (#22692)

- Adds the new field and migration to create the column.
- Makes all writes go to both old and new field.

openedx/core/djangoapps/programs/tests/test_signals.py

@@ -146,6 +146,7 @@ class CertChangedReceiverTest(TestCase):
         mock_is_learner_issuance_enabled.return_value = True
 
         site_config = SiteConfigurationFactory.create(
+            site_values={'course_org_filter': ['edX']},
             values={'course_org_filter': ['edX']},
         )