Remove external-dns --events flag

The events flag causes the external-dns controller to ignore route
events for extended periods of time in some circumstances. For now,
removing the flag and replacing with the interval flag.

cmd/install/assets/hypershift_operator.go

@@ -205,7 +205,7 @@ func (o ExternalDNSDeployment) Build() *appsv1.Deployment {
 								"--txt-suffix=-external-dns",
 								fmt.Sprintf("--txt-owner-id=%s", txtOwnerId),
 								fmt.Sprintf("--label-filter=%s!=%s", hyperv1.RouteVisibilityLabel, hyperv1.RouteVisibilityPrivate),
-								"--events",
+								"--interval=1m",
 							},
 							Ports: []corev1.ContainerPort{{Name: "metrics", ContainerPort: 7979}},
 							LivenessProbe: &corev1.Probe{