@overloads are not checked to be the same as body: sync or async

[sobolevn]

This code type-checks correctly with 1.5.1:

from typing import overload

@overload
def iter_data(s: str) -> list[str]: ...
@overload
def iter_data(s: int) -> int: ...

async def iter_data(s): ...

And this one too:

from typing import overload

@overload
async def iter_data(s: str) -> list[str]: ...
@overload
async def iter_data(s: int) -> int: ...

def iter_data(s): ...

Correct one also type-checks:

from typing import overload

@overload
async def iter_data(s: str) -> list[str]: ...
@overload
async def iter_data(s: int) -> int: ...

async def iter_data(s): ...

I have a fix ready.