fix(test): accept user_api_key_auth in get_tools_from_mcp_servers mock

The side_effect for the all-servers case did not accept the new kwarg,
so tools/list returned an empty list.

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/mcp_tests/test_mcp_server.py

@@ -881,6 +881,7 @@ async def test_get_tools_from_mcp_servers():
                 extra_headers=None,
                 add_prefix=False,
                 raw_headers=None,
+                user_api_key_auth=None,
             ):
                 if server.server_id == "server1_id":
                     return [mock_tool_1]