WIP Emit events from the PipelineRun controller

Emit additional events:
- Pipeline Start

Emit all events through the events.go module.
Align and simplify the reconcile structure to have clear points
for error handling and emitting events.

Author: afrittoli

pkg/reconciler/pipelinerun/controller.go

@@ -69,6 +69,7 @@ func NewController(images pipeline.Images) func(context.Context, configmap.Watch
 			ConfigMapWatcher:  cmw,
 			ResyncPeriod:      resyncPeriod,
 			Logger:            logger,
+			Recorder:          controller.GetEventRecorder(ctx),
 		}
 
 		c := &Reconciler{