Remove many unnecessary constructor calls of Vectorized<T> (#58875)
Summary:
Refresh https://github.com/pytorch/pytorch/issues/56241
Pull Request resolved: https://github.com/pytorch/pytorch/pull/58875
Reviewed By: mruberry
Differential Revision: D28892034
Pulled By: ezyang
fbshipit-source-id: 21074e45f29a780168852be5305420a3cc1148fc
