Request: Detect redundant overload with keyword-only params

[Avasam]

Feature
I'd like mypy to raise a "overload won't be matched" or "is redundant" or similar for the following two cases:

@overload
def foo(a: str, b: str, c: str): ...
@overload
def foo(a: str, *, b: str, c: str): ...  # I believe this is redundant

@overload
def foo(a: str, *, b: str, c: str): ...  # I believe this is redundant
@overload
def foo(a: str, b: str, c: str): ...

Pitch
Redundant or unreachable overloads are a code smell revealing either an error that slipped by or a misunderstanding of overloads. This is already raised with simpler signatures.
Example from a typeshed PR where a redundant overload was accidentally left in: python/typeshed#10706 (comment)