onnxruntime

4880f1da - Fix attention fusion for UNet onnx model export when using LoRA weights (#17249)

Fix attention fusion for UNet onnx model export when using LoRA weights (#17249) ### Description Tested with stable diffusion unet models exported by both pytorch 2.1.0 (nightly) and pytorch 1.13.1, with and without LoRA weights. ### Motivation and Context LoRA weights modifiy the unet model by adding matmul and scale operations to every q/k/v/out tensors, which breaks the current MHA pattern recognition.