Fix route attachments to gateways

Co-authored-by: Romain <rtribotte@users.noreply.github.com>

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

@@ -1,49 +0,0 @@
----
-kind: GatewayClass
-apiVersion: gateway.networking.k8s.io/v1
-metadata:
-  name: my-gateway-class
-spec:
-  controllerName: traefik.io/gateway-controller
-
----
-kind: Gateway
-apiVersion: gateway.networking.k8s.io/v1
-metadata:
-  name: my-gateway
-  namespace: default
-spec:
-  gatewayClassName: my-gateway-class
-  listeners: # Use GatewayClass defaults for listener definition.
-    - name: tls
-      protocol: TLS
-      port: 9001
-      tls:
-        mode: Passthrough
-      allowedRoutes:
-        kinds:
-          - kind: TLSRoute
-            group: gateway.networking.k8s.io
-        namespaces:
-          from: Same
-
----
-kind: TLSRoute
-apiVersion: gateway.networking.k8s.io/v1alpha2
-metadata:
-  name: tls-app-1
-  namespace: default
-spec:
-  parentRefs:
-    - name: my-gateway
-      kind: Gateway
-      group: gateway.networking.k8s.io
-  hostnames:
-    - "*.foo.*.bar"
-  rules:
-    - backendRefs:
-        - name: whoamitcp
-          port: 9000
-          weight: 1
-          kind: Service
-          group: ""