Returns a tuple of release data (version, manifest_ur) for every release of the
        given package name available on the current registry.

def get_all_package_releases(self, package_name: str) -> Iterable[Tuple[str, str]]:
        """
        Returns a tuple of release data (version, manifest_ur) for every release of the
        given package name available on the current registry.
        """
        validate_package_name(package_name)
        self._validate_set_registry()
        release_ids = self.registry._get_all_release_ids(package_name)
        for release_id in release_ids:
            _, version, manifest_uri = self.registry._get_release_data(release_id)
            yield (version, manifest_uri)