Gate it behind feature flags

test_runner/fixtures/neon_fixtures.py

@@ -2914,6 +2914,7 @@ class Endpoint(PgProtocol):
 
         # Write it back updated
         with open(config_path, "w") as file:
+            log.info(json.dumps(dict(data_dict, **kwargs)))
             json.dump(dict(data_dict, **kwargs), file, indent=4)
 
     # Mock the extension part of spec passed from control plane for local testing

test_runner/regress/test_migrations.py

@@ -10,7 +10,7 @@ def test_migrations(neon_simple_env: NeonEnv):
     endpoint = env.endpoints.create("test_migrations")
     log_path = endpoint.endpoint_path() / "compute.log"
 
-    endpoint.respec(skip_pg_catalog_updates=False)
+    endpoint.respec(skip_pg_catalog_updates=False, features=["migrations"])
     endpoint.start()
 
     time.sleep(1)  # Sleep to let migrations run