Filter ingress class resources by name

Co-authored-by: SantoDE <manuel.zapf@traefik.io>

integration/fixtures/k8s/08-ingressclass.yml

@@ -0,0 +1,70 @@
+apiVersion: networking.k8s.io/v1beta1
+kind: IngressClass
+metadata:
+  name: traefik-keep
+spec:
+  controller: traefik.io/ingress-controller
+
+---
+kind: Ingress
+apiVersion: networking.k8s.io/v1beta1
+metadata:
+  name: "whoami-keep-route"
+spec:
+  ingressClassName: "traefik-keep"
+  rules:
+  - host: "whoami.test.keep"
+    http:
+      paths:
+      - path: "/keep"
+        backend:
+          serviceName: "whoami"
+          servicePort: 80
+
+---
+apiVersion: networking.k8s.io/v1beta1
+kind: IngressClass
+metadata:
+  name: traefik-drop
+spec:
+  controller: traefik.io/ingress-controller
+
+---
+kind: Ingress
+apiVersion: networking.k8s.io/v1beta1
+metadata:
+  name: "whoami-drop-route"
+spec:
+  ingressClassName: "traefik-drop"
+  rules:
+  - host: "whoami.test.drop"
+    http:
+      paths:
+      - path: "/drop"
+        backend:
+          serviceName: "whoami"
+          servicePort: 80
+
+---
+apiVersion: networking.k8s.io/v1beta1
+kind: IngressClass
+metadata:
+  name: traefik-not-ingress-controller
+spec:
+  controller: not.tr43phic.io/ingress-controller
+
+---
+kind: Ingress
+apiVersion: networking.k8s.io/v1beta1
+metadata:
+  name: "whoami-drop-ingress"
+spec:
+  ingressClassName: "traefik-not-ingress-controller"
+  rules:
+  - host: "whoami.test.not.ingress"
+    http:
+      paths:
+      - path: "/ingress"
+        backend:
+          serviceName: "whoami"
+          servicePort: 80

integration/fixtures/k8s_ingressclass.toml

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+[global]
+  checkNewVersion = false
+  sendAnonymousUsage = false
+
+[log]
+  level = "DEBUG"
+
+[api]
+  insecure = true
+
+[entryPoints]
+  [entryPoints.web]
+    address = ":8000"
+
+[providers.kubernetesIngress]
+  ingressClass = "traefik-keep"