transformers

795c1444 - Improving pipeline tests (#12784)

Improving pipeline tests (#12784) * Proposal * Testing pipelines slightly better. - Overall same design - Metaclass to get proper different tests instead of subTest (not well supported by Pytest) - Added ANY meta object to make output checking more readable. - Skipping architectures either without tiny_config or without architecture. * Small fix. * Fixing the tests in case of None value. * Oups. * Rebased with more architectures. * Fixing reformer tests (no override anymore). * Adding more options for model tester config. Co-authored-by: Lysandre <lysandre.debut@reseau.eseo.fr>