Add --warp-slot argument to |solana-ledger-tool create-snapshot| (#10474)

automerge

multinode-demo/bootstrap-validator.sh

@@ -33,6 +33,9 @@ while [[ -n $1 ]]; do
     elif [[ $1 = --gossip-port ]]; then
       args+=("$1" "$2")
       shift 2
+    elif [[ $1 = --dev-halt-at-slot ]]; then
+      args+=("$1" "$2")
+      shift 2
     elif [[ $1 = --dynamic-port-range ]]; then
       args+=("$1" "$2")
       shift 2