Enable win-arm64
This patch enables Pytorch build from source with Ninja and
'Visual Studio 16 2019' CMake generator on Windows on Arm.
Tests:
- Build from source: 'python setup.py develop'.
- Run simple Pytorch example: passed
- python test\test_torch.py:
-- same results as on x64
-- Ran 1344 tests, failures=2
Pull Request resolved: https://github.com/pytorch/pytorch/pull/72424
