gatewayapi: adding support for TCPRoute and TLSRoute

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

pkg/provider/kubernetes/gateway/fixtures/tlsroute/without_tlsroute.yml

@@ -0,0 +1,28 @@
+---
+kind: GatewayClass
+apiVersion: networking.x-k8s.io/v1alpha1
+metadata:
+  name: my-gateway-class
+spec:
+  controller: traefik.io/gateway-controller
+
+---
+kind: Gateway
+apiVersion: networking.x-k8s.io/v1alpha1
+metadata:
+  name: my-gateway
+  namespace: default
+spec:
+  gatewayClassName: my-gateway-class
+  listeners:  # Use GatewayClass defaults for listener definition.
+    - protocol: TLS
+      port: 8080
+      tls:
+        mode: Passthrough
+      routes:
+        kind: TLSRoutes
+        namespaces:
+          from: Same
+        selector:
+          matchLabels:
+            app: foo