log_samples File name too long. Need truncation or override

When setting --log_samples, the default logic for lm_eval.main is the following:

            if args.log_samples:
                for task_name, config in results["configs"].items():
                    output_name = "{}_{}".format(
                        re.sub("/|=", "__", args.model_args), task_name
                    )
                    filename = path.joinpath(f"{output_name}.jsonl")
                    samples_dumped = json.dumps(
                        samples[task_name],
                        indent=2,
                        default=_handle_non_serializable,
                        ensure_ascii=False,
                    )
                    filename.write_text(samples_dumped, encoding="utf-8")

If a user passes in a lengthy --model_args such as pretrained=${model_path},tokenizer=${tokenizer},tensor_parallel_size=1,dtype=float16,gpu_memory_utilization=0.8,data_parallel_size=1

The filename can become extremely length, especially if the pretrained is a local path nested in many directories, which leads to

OSError: [Errno 36] File name too long: 

Either this should be truncated, or user should be allowed to specify a path_name to override args.model_args, or only set output_name to task_name and let output_path be the differentiator.

                    output_name = "{}_{}".format(
                        re.sub("/|=", "__", args.model_args), task_name
                    )