Dev infrastructure overhaul

[ao508]

TODO:

• [ ] Add missing label generator mock data files (most mock data files are kept in sync across repos but the label generator had some specific custom ones specific to the label generator logic)
• [ ] Port over label generator unit tests
• [ ] Update permissions for request filter and dashboard
• [ ] Test end-to-end workflow for new requests
• [ ] Test end-to-end workflow for sample updates