Fix windows python 3.8 required dlls not found

[atalman]

Fixes following issue:

C:\Miniconda\lib\site-packages\torchvision\io\image.py:13: UserWarning: Failed to load image Python extension: Could not find module 'C:\Miniconda\Lib\site-packages\torchvision\image.pyd' (or one of its dependencies). Try using the full path with constructor syntax.
torch: 1.13.0.dev20221006
  warn(f"Failed to load image Python extension: {e}")
torchvision: 0.15.0.dev20221006
torch cuda: 11.7
torch cudnn: 8500
Calling smoke_test_conv2d
Testing smoke_test_conv2d with cuda
Traceback (most recent call last):
  File "C:\Miniconda\lib\site-packages\torch\_ops.py", line 501, in __getattr__
    op, overload_names = torch._C._jit_get_operation(qualified_op_name)
RuntimeError: No such operator image::decode_png

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
  File "./test/smoke_test/smoke_test.py", line 92, in <module>
    main()
  File "./test/smoke_test/smoke_test.py", line 87, in main
    smoke_test_torchvision()
  File "./test/smoke_test/smoke_test.py", line 41, in smoke_test_torchvision
    print("Is torchvision useable?", all(x is not None for x in [torch.ops.image.decode_png, torch.ops.torchvision.roi_align]))
  File "C:\Miniconda\lib\site-packages\torch\_ops.py", line 505, in __getattr__
    raise AttributeError(
AttributeError: '_OpNamespace' 'image' object has no attribute 'decode_png'
Error: Process completed with exit code 1.

Same as: pytorch/audio#2735

[datumbox]

Thanks @atalman. I don't have too much context around the windows fixes but I trust your judgment on this. LGTM.

[github-actions]

Hey @atalman!

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