add AZRebalance also in suspend action

[infa-ddeore]

during our node rotation az rebalanced the nodes, at this time desired and running nodes were 6
ASG added an extra node to balance the nodes across AZs regardless of desired count
as soon as the new node started, ASG found 7 nodes running but desired is 6 so it killed an old node (because of OldestLaunchConfiguration termination policy) to match the desired count

after the last worker node rotation eks-rolling-update changed ASG from 6 to 4 thinking the activity is completed, it caused 1 node abruptly terminate

so for next cluster upgrade we updated the script locally to include AZRebalance in suspend

it would be good if that fix is included here as well