Differentiate integration test workflow between dev and prod apps so …

[I-Dont-Remember]

…it's easy to import for others

What was changed?

...

Why is this good for our users?

This is good because... it's going to be less confusing to import a workflow connected to an actual app that's available in prod, vs a dev app which we don't provide uptime guarantees for.

Attestation

Below you'll find a checklist. For each item on the list, check one option and delete the other.

• Unit Tests
  • [x] This PR does not require tests.
• Documentation
  • [x] This change does not need a documentation update.
• Integration Testing
  • [x] At minimum, ran the ./test_workflows/workflow_buddy_end_to_end_test_read_only.slackworkflow workflow and it was both successfully completed & outputs looked correct (We don't have a way to assert that changes are correct yet).