Replace deprecated controller-runtime scheme package location

Kubernetes controller-runtime dependency deprecated the old location
operator-framework/operator-sdk#1876

Replace import sigs.k8s.io/controller-runtime/pkg/runtime/scheme
with sigs.k8s.io/controller-runtime/pkg/scheme

pkg/apis/apps/v1alpha1/register.go

@@ -7,7 +7,7 @@ package v1alpha1
 
 import (
 	"k8s.io/apimachinery/pkg/runtime/schema"
-	"sigs.k8s.io/controller-runtime/pkg/runtime/scheme"
+	"sigs.k8s.io/controller-runtime/pkg/scheme"
 )
 
 var (