[DML] DenseNet(ONNX) doesn't work on DML backend

[Christywl]

Test Env:
Chromium Version: nightly build 75.0.3739.0 (1a2331d)
Platform: Windows

Expected Result:
DenseNet(ONNX) should work.

Actual Result:
DenseNet(ONNX) doesn't work on DML backend:

[632:6956:0529/135633.512:ERROR:compilation_delegate_dml.cc(545)] Failed creating operator.
[632:6956:0529/135633.512:ERROR:compilation_delegate_dml.cc(922)] Failed compiling softmax operator.
[632:6956:0529/135633.512:ERROR:compilation_delegate_dml.cc(505)] Failed compiling model.

How to Reproduce:

1. Setup test server and start
2. Launch chromium with chrome.exe --use-dml and visit http://localhost:8080/examples/image_classification
3. Select SUSTAINED_SPEED
4. Select DenseNet(ONNX)

[Christywl]

Similar issue for:

• SqueezeNet(OpenVINO)
• DenseNet 121(OpenVINO)