Use versioned_fixtures for RequestResponsePairsAuthzTest

The dojo_testdata.json fixture contains Endpoint rows, which raise
NotImplementedError in Endpoint.__init__ when V3_FEATURE_LOCATIONS is
enabled. Mirror the surrounding API test classes by applying the
@versioned_fixtures decorator so the locations-aware fixture is loaded
on the V3 matrix leg.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: Maffooch

unittests/test_rest_framework.py

@@ -1788,6 +1788,7 @@ def test_request_response_get(self):
         self.assertEqual(200, response.status_code, response.content[:1000])
 
 
+@versioned_fixtures
 class RequestResponsePairsAuthzTest(DojoAPITestCase):
 
     fixtures = ["dojo_testdata.json"]