Fix breaking changes from sigs.k8s.io/controller-runtime update

- `ctrl.Options#MetricsBindAddress` (TCP address that the controller should bind to for serving prometheus metrics) was deprecated and has been replaced with `metricsserver.Options#BindAddress` (in a `Metrics` struct) [1]
- `crl.Options#Port` (port that the webhook server serves at) was deprecated and has been replaced with `webhook.Options#Port` (in a `WebhookServer` field) [2]

[1] kubernetes-sigs/controller-runtime@e59161e#diff-d500fbd6a2aa620607ca5e2a7c3ac4f1a4c82309d1a549561e92abfcb18f2f0eL222-L225
[2] kubernetes-sigs/controller-runtime@e92eadb#diff-d500fbd6a2aa620607ca5e2a7c3ac4f1a4c82309d1a549561e92abfcb18f2f0eL282-L286

main.go

@@ -31,6 +31,8 @@ import (
 	ctrl "sigs.k8s.io/controller-runtime"
 	"sigs.k8s.io/controller-runtime/pkg/healthz"
 	"sigs.k8s.io/controller-runtime/pkg/log/zap"
+	metricsserver "sigs.k8s.io/controller-runtime/pkg/metrics/server"
+	"sigs.k8s.io/controller-runtime/pkg/webhook"
 
 	backstageiov1alpha1 "redhat-developer/red-hat-developer-hub-operator/api/v1alpha1"
 	controller "redhat-developer/red-hat-developer-hub-operator/controllers"
@@ -75,9 +77,13 @@ func main() {
 	ctrl.SetLogger(zap.New(zap.UseFlagOptions(&opts)))
 
 	mgr, err := ctrl.NewManager(ctrl.GetConfigOrDie(), ctrl.Options{
-		Scheme:                 scheme,
-		MetricsBindAddress:     metricsAddr,
-		Port:                   9443,
+		Scheme: scheme,
+		Metrics: metricsserver.Options{
+			BindAddress: metricsAddr,
+		},
+		WebhookServer: webhook.NewServer(webhook.Options{
+			Port: 9443,
+		}),
 		HealthProbeBindAddress: probeAddr,
 		LeaderElection:         enableLeaderElection,
 		LeaderElectionID:       "06bdbdd5.rhdh.redhat.com",