[torch][te] aten::type_as is unary, not binary (#48085)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/48085
We were treating it as a binary operator, which implies shape
broadcasting, even though the second arg is thrown away aside from the type.
Treating it as a unary is the proper approach.
ghstack-source-id: 116873680
Test Plan: new unit test
Reviewed By: ZolotukhinM
Differential Revision: D25017585
fbshipit-source-id: 0cfa89683c9bfd4fbb132617c74b47b268d7f368
