Refactor multinode-demo/ scripts to avoid shipping fullnode-x.sh (#3835)

multinode-demo/clear-fullnode-config.sh

@@ -0,0 +1,17 @@
+#!/usr/bin/env bash
+#
+# Clear the current cluster configuration
+#
+
+here=$(dirname "$0")
+# shellcheck source=multinode-demo/common.sh
+source "$here"/common.sh
+
+set -e
+
+for i in "$SOLANA_RSYNC_CONFIG_DIR" "$SOLANA_CONFIG_DIR"; do
+  echo "Cleaning $i"
+  rm -rvf "$i"
+  mkdir -p "$i"
+done
+