`station_status.json` MUST be required when `station_information.json` is present

[PierrickP]

On https://gbfs-validator.netlify.app/?url=https%3A%2F%2Fdata.rideflamingo.com%2Fgbfs%2Fwellington%2Fgbfs.json

station_information.json exist and not station_status.json

Any station that is represented in station_information.json MUST have a corresponding entry in station_status.json. https://github.com/MobilityData/gbfs/blob/v2.2/gbfs.md#station_informationjson

On this case, station_status.json must be required

[richfab]

Related to https://github.com/MobilityData/gbfs-validator/issues/153