Automatic merge from submit-queue (batch tested with PRs 39803, 39698, 39537, 39478)

Use controller interface for everything in config factory

**What this PR does / why we need it**:

We want to replace controller structs with interfaces 
- per the TODO in `ControllerInterface`
- Specifically this will make the decoupling from Config and reuse of the scheduler's subcomponents cleaner.