* pnnx convert onnx layernorm * fuse early * skip layernorm affine false test for torch 2.1 * pnnx convert onnx layernorm instancenorm groupnorm * take num_features from input shape for instancenorm module * torch < 1.10 can not handle track_running_stats=True
Co-authored-by: nihui <nihui@users.noreply.github.com> Co-authored-by: xiaooquanwu <546749317@qq.com>