[ubuntu] Rename build scripts (#8866)

* [ubuntu] Rename build scripts

* [ubuntu] Change reboot to inline shell

* [ubuntu] Move disk space validation to pester tests

* [ubuntu] Rename helper and tests files

* [ubuntu] Changes to cleanup, post-deployment and r scripts

images/ubuntu/scripts/build/install-nodejs.sh

@@ -0,0 +1,29 @@
+#!/bin/bash -e
+################################################################################
+##  File:  install-nodejs.sh
+##  Desc:  Install Node.js LTS and related tooling (Gulp, Grunt)
+################################################################################
+
+# Source the helpers for use with the script
+source $HELPER_SCRIPTS/install.sh
+
+# Install default Node.js
+defaultVersion=$(get_toolset_value '.node.default')
+curl -fsSL https://raw.githubusercontent.com/tj/n/master/bin/n -o ~/n
+bash ~/n $defaultVersion
+
+# Install node modules
+node_modules=$(get_toolset_value '.node_modules[].name')
+npm install -g $node_modules
+
+echo "Creating the symlink for [now] command to vercel CLI"
+ln -s /usr/local/bin/vercel /usr/local/bin/now
+
+# fix global modules installation as regular user
+# related issue https://github.com/actions/runner-images/issues/3727
+sudo chmod -R 777 /usr/local/lib/node_modules 
+sudo chmod -R 777 /usr/local/bin
+
+rm -rf ~/n
+
+invoke_tests "Node" "Node.js"