Fix test_builtins_have_signatures in test_inspect

[serhiy-storchaka]

test_builtins_have_signatures in test_inspect is only passed by accident. It always passed because it checked the same object (the last object the builtins module, zip) in the loop that had no signature. But after adding the signature for zip in #111999 it exploded with failures.

Linked PRs

• gh-112001: Fix test_builtins_have_signatures in test_inspect #112002
• [3.12] gh-112001: Fix test_builtins_have_signatures in test_inspect (GH-112002) #112003
• [3.11] gh-112001: Fix test_builtins_have_signatures in test_inspect (GH-112002) #112004