ParamSpec: mypy is happy for args to be annotated with P.kwargs and kwargs to be annotated with P.args

[AlexWaygood]

Bug Report

Mypy has no issues with this snippet of code. It probably should:

from typing import Callable
from typing_extensions import ParamSpec

P = ParamSpec("P")

def func(callback: Callable[P, str]) -> Callable[P, str]:
    def inner(*args: P.kwargs, **kwargs: P.args) -> str:
        return 'baz'
    return inner

This bug was accidentally discovered in #13459.

To Reproduce

https://mypy-play.net/?mypy=latest&python=3.10&gist=87f5f5277409f0fd77675e8dcc6a11fc

Expected Behavior

Mypy should emit two errors for this snippet:

1. *args have been annotated with P.kwargs instead of P.args
2. **kwargs have been annotated with P.args instead of P.kwargs

Actual Behavior

No error is emitted.