## What changed?
Drop outstanding standalone activity chasm tasks. Return unimplemented
error if standalone activity is disabled. Disabled standalone activity
integration tests.
## Why?
In the event of a rollback for a server version where standalone
activity was enabled to v1.30.0-148, we need to gracefully handle any
outstanding tasks and ensure standalone APIs return unimplemented.
Integration test also must be disabled since standalone activity will
not function in this version.
## How did you test it?
- [X] built
- [X] run locally and tested manually
- [X] covered by existing tests
- [ ] added new unit test(s)
- [ ] added new functional test(s)
(cherry picked from commit fae3f7428bb1f0f16f1e7a586c5661ab09d98592)
