Enriched Genesis tests to confirm all Genesis components are disabled when GSM transitions to CaughtUp

Today's test suite doesn't test this, and so didn't catch Issue #1490. It's straight-forward enough that I'm surprised code review didn't catch it. Regardless, it's tech debt to not cover that with tests.

Moreover: for GDD, LoP, LoE, etc the logic for disabling and re-enabling is trivial, but for CSJ the re-enable logic might not be trivial. There is at least one trivial option, but it's somewhat wasteful. So some tests should exercise this.

Start by locating the GSM transition to CaughtUp and the tests covering Genesis components, then inspect how GDD, LoP, LoE, and CSJ are disabled and re-enabled. Add coverage confirming every component is disabled on transition and that CSJ, as well as the other components, is correctly re-enabled; the tests should prevent a regression like Issue #1490.

Written by the indexing model from the issue text.