Updated the TDG's generation of CapabilityRequests to be config driven
Completes STT-1197.
Updated proposal generator to use the TDG for CRs, CRPs and TargetOverrides. The Proposal Generator now uses the TDG to make CapabilityRequests.
Added JSON config files for VLA/GBT CRs, which can be configured by calls to generate_{vla|gbt}_capability_request_with_answers
, which wraps the new generator methods to modify the JSON template and create the requested entities.