Input, optional): Optional image input to work with IP Adapters.   ip_adapter_image_embeds (List[torch.FloatTensor], optional) —
Pre-generated image embeddings for IP-Adapter. It should be a list of length same as number of IP-adapters.
Each element should be a tensor of shape (batch_size, num_images, emb_dim). It should contain the negative image embedding
if do_classifier_free_guidance is set to True.
If not provided, embeddings are computed 