Support Kubernetes Ingress pathType

Co-authored-by: jbdoumenjou <jb.doumenjou@gmail.com>
Co-authored-by: kevinpollet <pollet.kevin@gmail.com>

pkg/provider/kubernetes/ingress/fixtures/v18-Ingress-with-ingress-annotation_ingress.yml

@@ -0,0 +1,15 @@
+kind: Ingress
+apiVersion: networking.k8s.io/v1beta1
+metadata:
+  name: ""
+  namespace: testing
+  annotations:
+    kubernetes.io/ingress.class: traefik
+spec:
+  rules:
+  - http:
+      paths:
+      - path: /bar
+        backend:
+          serviceName: service1
+          servicePort: 80