Provide 'out' parameter for 'tensordot' (#47278)
Summary:
Fixes https://github.com/pytorch/pytorch/issues/42102
Added an optional out parameter to the tensordot operation to allow using buffers.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/47278
Test Plan: pytest test/test_torch.py -k tensordot -v
Reviewed By: agolynski
Differential Revision: D24706258
Pulled By: H-Huang
fbshipit-source-id: eb4bcd114795f67de3a670291034107d2826ea69
