Fix url_path_for typehints

[aminalaee]

Changes type hints for url_path_for . There's a mismatch between url_for and url_path_for as one accepts Any and the other one is str. They should both be Any.

Right now url_path_for expects path_parameters to be string, which is not the case, and url_for could be int, UUID, float, etc.

Fixes #1319.

[florimondmanca]

From reviewing this and the associated issue, this seems legit to me!

[aminalaee]

@PrettyWood @florimondmanca I think the typing.Any isn't worth much for the path_params.

Checking starlette/convertors.py:

CONVERTOR_TYPES = {
    "str": StringConvertor(),
    "path": PathConvertor(),
    "int": IntegerConvertor(),
    "float": FloatConvertor(),
    "uuid": UUIDConvertor(),
}

we could have a Union of these to be more explicit. Any ideas?