test(announcement): version the dismiss view test fixture for V3_FEATURE_LOCATIONS

TestDismissOsMessageView loaded dojo_testdata.json directly, which raises NotImplementedError under V3_FEATURE_LOCATIONS=True (the fixture contains deprecated Endpoint records). Adding the @versioned_fixtures decorator swaps it to dojo_testdata_locations.json under V3, matching the convention used by the rest of the suite. Test-only change; verified passing locally under both V3=True and V3=False.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

Author: devGregA

unittests/test_os_message.py

@@ -11,7 +11,7 @@
 from dojo import context_processors
 from dojo.announcement import os_message
 from dojo.models import User, UserContactInfo
-from unittests.dojo_test_case import DojoTestCase
+from unittests.dojo_test_case import DojoTestCase, versioned_fixtures
 
 
 class _Resp:
@@ -318,6 +318,7 @@ def test_os_banner_not_dismissible_for_anonymous(self):
         self.assertFalse(entries[0]["dismissible"])
 
 
+@versioned_fixtures
 class TestDismissOsMessageView(DojoTestCase):
     fixtures = ["dojo_testdata.json"]