Add cross namespace verification in Kubernetes CRD

pkg/provider/kubernetes/crd/fixtures/tcp/with_tls_options_cross_namespace.yml

@@ -0,0 +1,30 @@
+apiVersion: traefik.containo.us/v1alpha1
+kind: IngressRouteTCP
+metadata:
+  name: test.route
+  namespace: default
+
+spec:
+  entryPoints:
+    - foo
+
+  routes:
+  - match: HostSNI(`foo.com`)
+    services:
+    - name: whoamitcp
+      port: 8000
+
+  tls:
+    options:
+      name: tls-options-cn
+      namespace: cross-ns
+
+---
+apiVersion: traefik.containo.us/v1alpha1
+kind: TLSOption
+metadata:
+  name: tls-options-cn
+  namespace: cross-ns
+
+spec:
+  minVersion: VersionTLS12