ion v2 base model. Use 768 for Stable Diffusion v2.   use_safetensors (bool, optional, defaults to None) —
If set to None, the safetensors weights are downloaded if they’re available and if the
safetensors library is installed. If set to True, the model is forcibly loaded from safetensors
weights. If set to False, safetensors weights are not loaded.   upcast_attention (bool, optional, defaults to None) —
Whether the attention computation should