ntiate a PyTorch diffusion pipeline from pretrained pipeline weights. The pipeline is set in evaluation mode (model.eval()) by default.  If you get the error message below, you need to finetune the weights for your downstream task:   Copied Some weights of UNet2DConditionModel were not initialized from the model checkpoint at runwayml/stable-diffusion-v1-5 and are newly initialized because the shapes did not match:
- conv_in.weight: found shape