Add Meta SUT (8b instruct with and without llamaguard)

[skim9]

Adding Meta SUT for the Llama3.1 8B instruct model (with and without llamaguard) using HuggingFace.

• 8B: https://huggingface.co/meta-llama/Llama-3.1-8B-Instruct
• Llamaguard: https://huggingface.co/meta-llama/Llama-Guard-3-8B

poetry run modelbench benchmark -m 10 --sut llama-3.1-8b-instruct-lg-h

The llamguard implementation checks if the output is unsafe according to llamaguard 8b, and if it is, it returns a benign response of "I can't answer that. Can I help with something else?"

[github-actions]

MLCommons CLA bot:
Thank you very much for your submission, we really appreciate it. Before we can accept your contribution, we ask that you sign the MLCommons CLA (Apache 2). Please use this [Google form] (https://forms.gle/Ew1KkBVpyeJDuRw67) to initiate authorization. If you are from an MLCommons member organization, we will request that you be added to the CLA. If you are not from a member organization, we will email you a CLA to sign. For any questions, please contact [email protected].
0 out of 1 committers have signed the MLCommons CLA.
❌ @skim9
_{You can retrigger this bot by commenting recheck in this Pull Request}