[FT] pass trust_remote_code as flag for loading datasets with custom code

## Issue encountered
When trying to run an evaluation while loading a dataset with custom code, there doesn't seem to be an easy way to set the option `trust_remote_code=True`.

The command line will say this:
```
The repository for swiss_leading_decision_summarization_eval contains custom code which must be executed to correctly load the dataset. You can inspect the repository content at https://hf.co/datasets/swiss_leading_decision_summarization_eval.
You can avoid this prompt in future by passing the argument `trust_remote_code=True`.

Do you wish to run the custom code? [y/N]
```

If the user can't type in `y` quick enough (not within 10 ish seconds), there is an error:
```
File "/Users/chuandu/Documents/workspace/legal_llm_evaluation/llm_eval_env/lib/python3.10/site-packages/datasets/load.py", line 131, in resolve_trust_remote_code
raise ValueError(
ValueError: The repository for swiss_leading_decision_summarization_eval contains custom code which must be executed to correctly load the dataset. You can inspect the repository content at https://hf.co/datasets/swiss_leading_decision_summarization_eval.
Please pass the argument `trust_remote_code=True` to allow custom code to be run.
```

## Solution/Feature
Currently we can pass `trust_remote_code=True` for the model, but a separate variable is needed for loading datasets with custom code `--model_args "pretrained=Qwen/Qwen2-0.5B-Instruct,trust_remote_code=True"`

A similar way to pass this to the lighteval CLI would be great.