Use pytest.raises context manager for aaiindex test. (#2108)

* Use pytest.raises context manager for aaiindex test.

No-Issue

Signed-off-by: James Tanner <tanner.jc@gmail.com>

galaxy_ng/tests/integration/api/test_aiindex.py

@@ -1,4 +1,5 @@
 import pytest
+import requests
 
 from ..utils import (
     UIClient,
@@ -194,12 +195,11 @@ def test_namespace_add_list_remove_aiindex(ansible_config, namespace, pe_namespa
     # 7. Repeat step 2 with a basic user
     with UIClient(config=ansible_config("basic_user")) as uclient:
         # 8. Assert permission error raises
-        assert (
+        with pytest.raises(requests.exceptions.HTTPError, match=r'.*403.*permission_denied.*'):
             uclient.post(
                 "_ui/v1/ai_deny_index/namespace/",
                 payload={"reference": namespace}
-            ).status_code == 403
-        )
+            )
 
     with UIClient(config=ansible_config("partner_engineer")) as uclient:
         # 9. add to the AI Index, a namespace owned by PE