Support `[dependency-groups]`

[sobolevn]

Right now this check fails when a dependency is in a optional group:

     def verify_external_req_stubs_require_its_runtime(
        req: Requirement, upstream_distribution: str | None
    ) -> None:
        """Verify that an external stubs package requires its runtime package."""
    
        if upstream_distribution is None:
            raise InvalidRequires(
                f"There is no upstream distribution on PyPI, so cannot verify {req}"
            )
    
        resp = requests.get(f"https://pypi.org/pypi/{upstream_distribution}/json")
        validate_pypi_response(resp, req)
        data: dict[str, Any] = resp.json()
    
        # TODO: PyPI doesn't seem to have version specific requires_dist. This does mean we can be
        # broken by new releases of upstream packages, even if they do not match the version spec we
        # have for the upstream distribution.
    
        if not (
            req.name == upstream_distribution  # Allow `types-foo` to require `foo`
            or runtime_in_upstream_requires(req, data)
            or runtime_in_upstream_sdist_requires(req, data)
        ):
            runtime_req_name = EXTERNAL_RUNTIME_REQ_MAP.get(req.name, req.name)
>           raise InvalidRequires(
                f"Expected dependency {runtime_req_name} to be listed in {upstream_distribution}'s "
                + "requires_dist or the sdist's *.egg-info/requires.txt"
            )
E           stub_uploader.metadata.InvalidRequires: Expected dependency httpx to be listed in Authlib's requires_dist or the sdist's *.egg-info/requires.txt

This happens because httpx is not a direct dependency of Authlib, but it is an optional one: https://github.com/authlib/authlib/blob/06015d20652a23eff8350b6ad71b32fe41dae4ba/pyproject.toml#L63

I think that this should be supported. I propose to add one more check: runtime_in_upstream_group_requires

Refs python/typeshed#14800