More flexible type support for `math.prod` and `math.sumprod`

Also related to https://github.com/python/typeshed/issues/11913

Currently, math.prod and math.sumprod do not properly support Decimal, Fraction, complex, or possibly other numeric types. This makes it inconvenient to replace builtins.sum with math.prod in a straightforward manner.

from typing import reveal_type
from fractions import Fraction
from math import prod

a = prod([Fraction(1), Fraction(2)])
reveal_type(a)  # it should be Fraction | Literal[1], but float for now

prod([complex(1, 0), complex(1, 2)])

Mypy Playground Link

I believe it should be followed the type stub of builtins.sum, but I’m not sure what breaking changes this might cause.

Commencez par examiner les stubs de types de math.prod et math.sumprod, puis comparez leur comportement avec le stub de builtins.sum. Utilisez les exemples liés de Mypy Playground pour vérifier l'inférence de Decimal, Fraction et complex, et confirmez les types obtenus ainsi que les éventuels problèmes de compatibilité avant de considérer l'issue comme terminée.