Remove tensorWithAllocator() from Type (#18780)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/18780
ghimport-source-id: 7d18a11ce87d988bd32f6ebb96acd878ab8d61be
Stack from [ghstack](https://github.com/ezyang/ghstack):
* **#18780 Remove tensorWithAllocator() from Type**
* #18779 Remove tensorFromBlob() from Type
Differential Revision: D14739336
fbshipit-source-id: 429ab10bb9f6ac9f97b5a11c7a836b6b6336cb2d
