Link onnx_library when BUILD_TEST=0 for Windows (#51937)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/51877
cc antoniovs1029
Pull Request resolved: https://github.com/pytorch/pytorch/pull/51937
Reviewed By: malfet
Differential Revision: D27470392
Pulled By: ezyang
fbshipit-source-id: 5abe47b58df9ea3f0706fa4d5a7c8dd92e738f8b
