feat: send events related to promise scheduling

[richcooper95]

Summary

In #367 we introduced some events into Kratix. This story is to continue this trend by firing events to the Promise when the workloads have been:

• scheduled (un)successfully;
• written (un)successfully to the state store.

Details

We can add an EventRecorder to the reconciler for the WorkPlacementController and the Scheduler, which can then be used to fire events associated with a Promise (see #367 for examples).