Fix ServersTransport reference from IngressRoute service definition

Co-authored-by: Jean-Baptiste Doumenjou <925513+jbdoumenjou@users.noreply.github.com>

pkg/provider/kubernetes/crd/fixtures/with_servers_transport.yml

@@ -109,3 +109,39 @@ spec:
     dialTimeout: 42
     responseHeaderTimeout: 42s
     idleConnTimeout: 42ms
+
+---
+apiVersion: traefik.containo.us/v1alpha1
+kind: ServersTransport
+metadata:
+  name: test
+  namespace: default
+
+spec:
+  serverName: "test"
+
+---
+apiVersion: traefik.containo.us/v1alpha1
+kind: IngressRoute
+metadata:
+  name: test.route
+  namespace: default
+
+spec:
+  entryPoints:
+    - foo
+
+  routes:
+    - match: Host(`foo.com`)
+      kind: Rule
+      services:
+        - name: external-svc-with-https
+          port: 443
+          serversTransport: test
+        - name: whoamitls
+          port: 443
+          serversTransport: default-test
+        - name: whoami3
+          port: 8443
+          serversTransport: foo-test@kubernetescrd
+