onnxruntime

cc7e8cc2 - Update dockerfiles/Dockerfile.source to avoid installing onnx (#17975)

Update dockerfiles/Dockerfile.source to avoid installing onnx (#17975) ### Description Update dockerfiles/Dockerfile.source to avoid installing onnx python package. ONNX is not listed in https://github.com/microsoft/onnxruntime/blob/main/requirements.txt.in. We do not have to install it. Especially when we do not run tests, the package provides no help when building onnxruntime from source. ### Motivation and Context Resolve #17781