[qa][all] New hacking 4.0.0 is available

Hello Everyone, Hacking 4.0.0 is available to use now which includes many common checks used in various projects. While upgrading to new hacking you can remove those checks definition from your repo hacking checks. Check release notes to find what all common checks are being moved from the project side to hacking: - https://docs.openstack.org/releasenotes/hacking/unreleased.html#relnotes-4-0... -gmann