Expose a location's 'Pickup instructions' via useDeliveryGroup()

[rbarreca]

As far as I can tell, a local pickup location's pickup instructions aren't on the DeliveryGroup object returns from useDeliveryGroup(). I see everything else but that. It'd be great to get that via a checkout UI extension so we could use it in a component.

Current value of selectedDeliveryOption:
{"handle":"xxx", "title":"Beer Lab", "code":"Beer Lab", "type":"pickup", "location":{"name":"Beer Lab", "address":{"address1":"1010 University Avenue", "address2":"", "city":"Honolulu", "zip":"96826", "countryCode":"US", "provinceCode":"HI", "phone":""}}}