[DRAFT] FEAT Add adversarial suffix attack GCG

[NaijingGuo]

Description

suffix attack from https://arxiv.org/pdf/2307.15043.pdf TODO:

• support llama3 and Phi-3
• test and add in the script for multiple prompt multiple models
• add the option to specify what token is not allowed as suffix
• [add suffix examples suffix converter] (need approval)

Tests and Documentation

Tests and documentation to be added.