--warn-redundant-cast doesn’t warn for simple generic types

Bug Report
See reproducer

To Reproduce

https://mypy-play.net/?mypy=latest&python=3.12&flags=warn-redundant-casts&gist=f923e1fafbc60a2b7a2fa3c9c3ceb785

from typing import TypeVar, cast

T = TypeVar("T")


def identity(xs: list[T]) -> list[T]:
    return xs


def f(xs: list[int]) -> list[int]:
    reveal_type(identity(xs))
    return cast(list[int], identity(xs))  # --warn-redundant-casts should trigger here

Expected Behavior

warns that the cast is redundant

Actual Behavior

doesn’t warn

Your Environment

• Mypy version used: 2.3.0
• Mypy command-line flags: --warn-redundant-casts
• Mypy configuration options from mypy.ini (and other config files): warn-redundant-casts = true
• Python version used: any

Start with the linked mypy-play reproducer and run it with --warn-redundant-casts to confirm the missing warning for cast(list[int], identity(xs)). Trace the redundant-cast check for generic list types, then add a regression test showing that this cast is reported while the existing type reveal remains valid.