`time.sleep()` type should reflect actually accepted parameters

[Dutcho]

In Python 3.14 and before, sleep() accepts:

• actual float (or subtype),
• or int-like, i.e. SupportsIndex.

From Python 3.15 (alpha 5), sleep() accepts:

• float-like, i.e. SupportsFloat,
• or int-like, i.e. SupportsIndex.

See discussion on different topic.

However, typeshed specifies float only:

def sleep(seconds: float, /) -> None: ...

I suggest to change that to actually accepted parameters.

[srittau]

Since typeshed doesn't support Python 3.15 yet, we should add SupportsIndex to the accepted arguments for now. PR welcome!

[Dutcho]

Okay, will draft a PR