Move UnsafeTensorFromTH and UnsafeStorageFromTH off Type (#21923)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/21923
ghimport-source-id: f015c8521ef9071eaa982cbf73c13aa925035956
Test Plan: Imported from OSS
Differential Revision: D15883390
Pulled By: li-roy
fbshipit-source-id: 6a7a7ffbe6000199d41cdca5efb97371f46dd8fe
