ted per prompt
device — (torch.device, optional):
torch device to place the resulting embeddings on   prompt_embeds (torch.FloatTensor, optional) —
Pre-generated text embeddings. Can be used to easily tweak text inputs, e.g. prompt weighting. If not
provided, text embeddings will be generated from prompt input argument.   negative_prompt_embeds (torch.FloatTensor, optional) —
Pre-generated negative text embeddings. For PixArt-Alpha, it’s should