e2e: add test for allowed location IPs

This commit adds a new e2e test fot the recently introduced
allowed-location-ips annotation. This test annotates the control-plane
node with an allowed IP and then ensures this IPs is reachable from
the curl helper Pod, which is now guaranteed to be scheduled on a
worker node.

Signed-off-by: Lucas Servén Marín <lserven@gmail.com>

e2e/helper-curl.yaml

@@ -12,7 +12,6 @@ spec:
       app.kubernetes.io/name: curl
   template:
     metadata:
-      creationTimestamp: null
       labels:
         app.kubernetes.io/name: curl
     spec: