DT 5062 Add openingHours to bike and car parks

[optionsome]

• Updates hsl park&ride updaters to parse openingHours into car and bike parks
• Expose the openingHours through graphql API so they can be fetched for dates
• Change so tag can be null and don't expose it through REST api

Note, we could use this information in routing as well but then we would have to take into account time zones