Moves setup files into embedded package.

internal/setup/cluster-services/traefik/kustomize.template/templates/ingressclass.yaml

@@ -0,0 +1,15 @@
+---
+# Source: traefik/templates/ingressclass.yaml
+apiVersion: networking.k8s.io/v1
+kind: IngressClass
+metadata:
+  annotations:
+    ingressclass.kubernetes.io/is-default-class: "true"
+  labels:
+    app.kubernetes.io/name: traefik
+    app.kubernetes.io/instance: traefik-traefik
+    helm.sh/chart: traefik-36.1.0
+    app.kubernetes.io/managed-by: Helm
+  name: traefik
+spec:
+  controller: traefik.io/ingress-controller