Need separate events for input stopped and input deleted #7812

Expected Behavior

When an input is stopped either by the user or due to an error (deleted from the InputRegistry), an InputStopped event should be propagated by the EventBus.

When an input is deleted (deleted from the InputStateService), an InputDeleted event should be propagated by the EventBus

Current Behavior

Currently, an InputDeleted event is propagated by the EventBus in both cases (input stopped and input deleted). This makes it impossible for components to react to one event type but not the other.

Context

For a new Input with persistent state stored in MongoDB, I would like to delete the MongoDB record when the Input is deleted, but retain the MongoDB record when the input is stopped. This is currently impossible because both state transitions emit the same event type.