[3.14] gh-137317: Fix inspect.signature() for class with wrapped __init__ or __new__...

[3.14] gh-137317: Fix inspect.signature() for class with wrapped __init__ or __new__ (GH-137862) (#138224)

gh-137317: Fix inspect.signature() for class with wrapped __init__ or __new__ (GH-137862)

Fixed several cases where __init__, __new__ or metaclass` __call__ is a descriptor
that returns a wrapped function.
(cherry picked from commit 025a2135eff848abf24f9dc52c81386eea9da397)

Co-authored-by: Ju4tCode <42488585+yanyongyu@users.noreply.github.com>