Turn safety and regard metrics to pure unitxt

[elronbandel]

Those metrics cannot be loaded trough huggingface load dataset until re implementated as unitxt metrics.

[dafnapension]

Hi @elronbandel , I gladly accept, but need some education..

[dafnapension]

Running prepare/cards/bold.py which uses: metrics=["metrics.regard"], am I expected to go through metrics.regard._compute(..) ? It seems that I do not. I am missing the point here, I suspect.

[dafnapension]

Resolved by PR #1004