Add `dataCenter` to GQL `Program` type

[joneubank]

Detailed Description

All program responses can include details on their assigned DataCenter. This data is being returned for all programs from the Program Service, so this can be added to the GQL type

• Add dataCenter property to the Program type in the GQL Schema
• Ensure that the program resolvers all format and return this data center data correctly

[Buwujiu]

Blocked by program service PR merging.