Extend HasElements to support multiple inputs (#28717)
Summary:
Pull Request resolved: https://github.com/pytorch/pytorch/pull/28717
Make HasElements support multiple inputs. Any input has element, then return true.
Test Plan: to be added
Reviewed By: BIT-silence
Differential Revision: D17972759
fbshipit-source-id: 3ecdea74a30fcfaaa6490fef1debc6cde68db922
