Merge pull request #48192 from gmarek/fix_subnet

Fix bug cluster-subnet logic

cluster/gce/util.sh

@@ -510,7 +510,7 @@ function make-gcloud-network-argument() {
     ret="${ret},aliases=pods-default:${alias_size}"
     ret="${ret} --no-can-ip-forward"
   else
-    if [[ ${PREEXISTING_NETWORK} = "true" && "${PREEXISTING_NETWORK_MODE}" != "custom" ]]; then
+    if [[ ${ENABLE_BIG_CLUSTER_SUBNETS} != "true" || (${PREEXISTING_NETWORK} = "true" && "${PREEXISTING_NETWORK_MODE}" != "custom") ]]; then
       ret="--network ${network}"
     else
       ret="--subnet=${network}"