Merge pull request #49021 from gmarek/master-size

Automatic merge from submit-queue

Create 64-core masters for huge clusters

cc @shyamjvs

cluster/gce/config-common.sh

@@ -33,6 +33,9 @@ function get-master-size {
   if [[ "${NUM_NODES}" -gt "500" ]]; then
     suggested_master_size=32
   fi
+  if [[ "${NUM_NODES}" -gt "3000" ]]; then
+    suggested_master_size=64
+  fi
   echo "${suggested_master_size}"
 }