refact: disable leader for update request controller (#3807)

Signed-off-by: prateekpandey14 <prateek.pandey@nirmata.com>

cmd/kyverno/main.go

@@ -429,7 +429,6 @@ func main() {
 		go certManager.Run(stopCh)
 		go policyCtrl.Run(2, prgen.ReconcileCh, stopCh)
 		go prgen.Run(1, stopCh)
-		go urc.Run(genWorkers, stopCh)
 		go grcc.Run(1, stopCh)
 	}
 
@@ -460,6 +459,7 @@ func main() {
 
 	// init events handlers
 	// start Kyverno controllers
+	go urc.Run(genWorkers, stopCh)
 	go le.Run(ctx)
 	go reportReqGen.Run(2, stopCh)
 	go configurationController.Run(stopCh)

pkg/background/update_request_controller.go

@@ -109,9 +109,12 @@ func NewController(
 
 // Run starts workers
 func (c *Controller) Run(workers int, stopCh <-chan struct{}) {
+	logger := c.log
 	defer utilruntime.HandleCrash()
 	defer c.queue.ShutDown()
-	defer c.log.Info("shutting down")
+
+	logger.Info("starting")
+	defer logger.Info("shutting down")
 
 	c.policyInformer.Informer().AddEventHandler(cache.ResourceEventHandlerFuncs{
 		UpdateFunc: c.updatePolicy, // We only handle updates to policy