fix: refactor test_server_terminate to improve readability of patch context

tests/unit/test_lit_server.py:320:10: SyntaxError: Cannot use parentheses within a `with` statement on Python 3.8 (syntax was added in Python 3.9)

Author: bhimrazy

tests/unit/test_lit_server.py

@@ -317,11 +317,9 @@ def test_server_terminate():
     server.verify_worker_status = MagicMock()
     server._transport = MagicMock()
 
-    with (
-        patch("litserve.server.LitServer._init_manager", return_value=MagicMock()) as mock_init_manager,
-        patch("litserve.server.LitServer._start_server", side_effect=Exception("mocked error")) as mock_start,
-        patch("litserve.server.LitServer.launch_inference_worker", return_value=([MagicMock()])) as mock_launch,
-    ):
+    with patch("litserve.server.LitServer._init_manager", return_value=MagicMock()) as mock_init_manager, \
+         patch("litserve.server.LitServer._start_server", side_effect=Exception("mocked error")) as mock_start, \
+         patch("litserve.server.LitServer.launch_inference_worker", return_value=([MagicMock()])) as mock_launch:
         with pytest.raises(Exception, match="mocked error"):
             server.run(port=8001)