move to.prim_dtype to lite interpreter (#39456)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/39456
Move aten::to.prim_dtype from full jit to lite interpreter
Test Plan: verify TTS model can be used
Reviewed By: iseeyuan
Differential Revision: D21856104
fbshipit-source-id: 774981a5c04798e3a87cf7d6e6682f35e604944e
