Add more challenges + cleanup (#5368)

Signed-off-by: Merwane Hamadi <merwanehamadi@gmail.com>

benchmark/agbenchmark/app.py

@@ -65,6 +65,7 @@ while json_files:
 
     with open(json_file, "r") as file:
         data = json.load(file)
+
         if "eval_id" not in data:
             data["eval_id"] = str(uuid.uuid4())
         # this will sort all the keys of the JSON systematically so that the order is always the same