Split groups data between production and testing environments

[tsibley]

These environments do not share the resources behind group—they have separate Cognito user pools and a shared but access-partitioned S3 bucket—so it doesn't make that much sense to bundle both into the same data file anymore. Pragmatically, this also avoids a bunch of noisy errors at local dev server start and periodically thereafter.

Testing

• [x] npm run test:ci passes locally
• [x] npm run lint passes locally
• [x] Checks pass

[tsibley]

Small thing: I'm assuming the first line in the description of 20a0a63 should start with

These environments do not share the same resources behind groups

Ah, thanks for the copy edit. I changed it to: