🩹(backend) address test flakiness while sorting Team accesses

Previously, there was a difference between Django's `order_by`
behavior and Python's `sorted` function, leading to test failures
under specific conditions. For example, entries such as 'Jose Smith'
and 'Joseph Walker' were not consistently sorted in the same order
between the two methods.

To resolve this issue, we've ensured that sorting the expected
results in the TeamAccess tests are both case-insensitive and
space-insensitive. This adjustment fix tests flakiness

src/backend/core/tests/team_accesses/test_api_team_accesses_list.py

@@ -266,11 +266,15 @@ def test_api_team_accesses_list_authenticated_ordering_user(ordering_fields):
     assert response.status_code == HTTP_200_OK
     assert response.json()["count"] == 21
 
+    def normalize(x):
+        """Mimic Django order_by, which is case-insensitive and space-insensitive"""
+        return x.casefold().replace(" ", "")
+
     results = [
         team_access["user"][ordering_fields]
         for team_access in response.json()["results"]
     ]
-    assert sorted(results) == results
+    assert sorted(results, key=normalize) == results
 
     response = client.get(
         f"/api/v1.0/teams/{team.id!s}/accesses/?ordering=-{ordering_fields}",
@@ -282,4 +286,4 @@ def test_api_team_accesses_list_authenticated_ordering_user(ordering_fields):
         team_access["user"][ordering_fields]
         for team_access in response.json()["results"]
     ]
-    assert sorted(results, reverse=True) == results
+    assert sorted(results, reverse=True, key=normalize) == results