Consolidate the overloads of TensorImpl::shallow_copy_and_detach (#68953)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/68953
This PR consolidates the almost identical lvalue and rvalue implementations of shallow_copy_and_detach into a single templated function.
ghstack-source-id: 147238376
Test Plan: Run existing unit tests.
Reviewed By: fduwjj
Differential Revision: D32679741
fbshipit-source-id: 89a870335d2e09ffd005c943733a787d20d352f9
(cherry picked from commit 750344c8600e05d4ab593956257c8191919eeef8)
