[3.13] gh-123930: Correct test of attribute failure to account for iOS (GH-125959) (#125960)

gh-123930: Correct test of attribute failure to account for iOS (GH-125959)

Update a test of importing attributes from binary modules to account for iOS conditions.
(cherry picked from commit 75401febc91a449cc4f4391d663e9a96ce91bb6c)

Co-authored-by: Russell Keith-Magee <russell@keith-magee.com>