Randomize network name in the basic cluster (GoogleCloudPlatform#17012)

Author: rpgoog

mmv1/products/hypercomputecluster/Cluster.yaml

@@ -749,5 +749,7 @@ examples:
     primary_resource_id: 'cluster'
     vars:
       cluster_id: 'my-cluster'
+      network_id: 'cluster-net1'
     test_vars_overrides:
       cluster_id: 'fmt.Sprintf("tf%s", acctest.RandString(t, 8))'
+      network_id: 'fmt.Sprintf("cluster-net1-%s", acctest.RandString(t,10))'

mmv1/templates/terraform/examples/hypercomputecluster_cluster_basic.tf.tmpl

@@ -14,7 +14,7 @@ resource "google_hypercomputecluster_cluster" "{{$.PrimaryResourceId}}" {
     config {
       new_network {
         description = "Network one"
-        network = "projects/${local.project_id}/global/networks/cluster-net1"
+        network = "projects/${local.project_id}/global/networks/{{index $.Vars "network_id"}}"
       }
     }
   }