Add view test for tensor_split (#46427)
Summary:
Fulfills Mike's suggestion here: https://github.com/pytorch/pytorch/pull/44868#discussion_r505095018
Pull Request resolved: https://github.com/pytorch/pytorch/pull/46427
Reviewed By: ezyang
Differential Revision: D24355107
Pulled By: mruberry
fbshipit-source-id: bddef2f9c2c41b5c5ac47a17d5ecdda580072e99
