Use git-lfs for large testing dependencies

[jonringer]

Is your feature request related to a problem? Please describe.
The current unpacked directory size (without git history) for onnxruntime is 450MB. This is what package repositories usually consume for packaging software, and it's massive. Git submodules are another 550MB+, which means a full checkout will be around 1GB+.

System information

• ONNX Runtime version (you are using):

Describe the solution you'd like
Use git-lfs

Describe alternatives you've considered
Use an alternate repo to hold test artifacts

Additional context

$ find . -type f -exec du -hd0 {} + | sort -rh | head -30
98M	./onnxruntime/python/tools/quantization/E2E_example_model/resnet50_v1.onnx
40M	./onnxruntime/test/testdata/ort_ckpt/bert_toy_lamb.ZeRO.3.3.ort.pt
35M	./onnxruntime/test/testdata/ort_ckpt/bert_toy_lamb.ZeRO.2.3.ort.pt
35M	./onnxruntime/test/testdata/ort_ckpt/bert_toy_lamb.ZeRO.1.3.ort.pt
35M	./onnxruntime/test/testdata/ort_ckpt/bert_toy_lamb.ZeRO.0.3.ort.pt
32M	./winml/test/scenario/models/coreml_Resnet50_ImageNet-dq.onnx
20M	./onnxruntime/test/testdata/bert_toy_postprocessed.onnx
10M	./winml/test/scenario/models/onnxzoo_lotus_inception_v1-dq.onnx
4.8M	./winml/test/common/testdata/squeezenet/model.onnx
4.8M	./winml/test/collateral/models/squeezenet_modifiedforruntimestests.onnx
4.8M	./winml/test/collateral/models/modelWithMetaData.onnx
4.8M	./winml/test/collateral/models/modelWith2MetaData.onnx
4.8M	./winml/test/collateral/models/ModelSubdirectory/ModelInSubdirectory.onnx
4.8M	./onnxruntime/test/testdata/squeezenet/model.onnx
4.8M	./nodejs/test/testdata/squeezenet.onnx
4.8M	./csharp/testdata/squeezenet.onnx
3.3M	./winml/test/collateral/models/starry-night-fp16.onnx
3.1M	./onnxruntime/test/testdata/transform/fusion/test_data_set_0/output_0.pb
2.8M	./winml/test/collateral/models/squeezenet_tensor_input.onnx
2.7M	./onnxruntime/python/tools/tensorrt/perf/models/yolov4/custom_test_data/test_data_set/output0.pb
2.0M	./onnxruntime/python/tools/tensorrt/perf/models/yolov4/custom_test_data/test_data_set/input0.pb
2.0M	./nodejs/test/testdata/squeezenet.input0.json
2.0M	./csharp/testdata/bench.in
1.7M	./winml/test/image/models/fns-candy_tensor.onnx
1.7M	./winml/test/image/models/fns-candy_Rgb8.onnx
1.7M	./winml/test/image/models/fns-candy_Bgr8_tensor_Batch3.onnx
1.7M	./winml/test/image/models/fns-candy_Bgr8.onnx
1.7M	./winml/test/image/models/fns-candy_Bgr8_freeDimInput.onnx
1.7M	./winml/test/image/models/fns-candy_Bgr8_freeDimInput_Batch10.onnx
1.7M	./winml/test/image/models/fns-candy_Bgr8_Batch3.onnx

related packaging issue: #5966

[jonringer]

closing due to staleness