Enable xnnpack_integration test in CI. (#37838)
Summary: Pull Request resolved: https://github.com/pytorch/pytorch/pull/37838
Test Plan: oss: python test/test_xnnpack_integration.py
Reviewed By: xcheng16
Differential Revision: D21405850
fbshipit-source-id: ba4ba06692b49315f110653d9492b2e14b618574
