[3.8] bpo-16575: Disabled checks for union types being passed by value. (GH-17960) by miss-islington · Pull Request #17964 · python/cpython

…thonGH-17960)

Although the underlying libffi issue remains open, adding these
checks have caused problems in third-party projects which are in
widespread use. See the issue for examples.

The corresponding tests have also been skipped.
(cherry picked from commit c12440c)

Co-authored-by: Vinay Sajip <vinay_sajip@yahoo.co.uk>