testnet-edge/testnet-beta now update while preserving the ledger (#5979)

* Check if an update is current before deploying it again

* Add (new) update command to deploy testnet updates

* Add --deploy-if-newer flag to permit conditional net updates

net/remote/remote-node.sh

@@ -216,6 +216,7 @@ EOF
   validator|blockstreamer)
     if [[ $deployMethod != skip ]]; then
       net/scripts/rsync-retry.sh -vPrc "$entrypointIp":~/.cargo/bin/ ~/.cargo/bin/
+      net/scripts/rsync-retry.sh -vPrc "$entrypointIp":~/version.yml version.yml
     fi
     if [[ $skipSetup != true ]]; then
       multinode-demo/clear-config.sh