Add aten::div NNAPI converter (#58541)
Summary:
Add support for aten::div op in the NNAPI model converter. Add variable
size input test as well.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/58541
Test Plan: pytest test/test_nnapi.py::TestNNAPI::test_div
Reviewed By: anshuljain1
Differential Revision: D28531943
fbshipit-source-id: e96342146f6de216f7b88443618edfc54963747c
