[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-gcc-compilers.sh

@@ -0,0 +1,28 @@
+#!/bin/bash -e
+################################################################################
+##  File:  install-gcc-compilers.sh
+##  Desc:  Install GNU C++ compilers
+################################################################################
+
+# Source the helpers for use with the script
+source $HELPER_SCRIPTS/os.sh
+source $HELPER_SCRIPTS/install.sh
+
+function InstallGcc {
+    version=$1
+
+    echo "Installing $version..."
+    apt-get install $version -y
+}
+
+# Install GNU C++ compiler
+add-apt-repository ppa:ubuntu-toolchain-r/test -y
+apt-get update -y
+
+versions=$(get_toolset_value '.gcc.versions[]')
+
+for version in ${versions[*]}; do
+    InstallGcc $version
+done
+
+invoke_tests "Tools" "gcc"