[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-cmake.sh

@@ -0,0 +1,29 @@
+#!/bin/bash -e
+################################################################################
+##  File:  install-cmake.sh
+##  Desc:  Install CMake
+##  Supply chain security: CMake - checksum validation
+################################################################################
+
+# Source the helpers for use with the script
+source $HELPER_SCRIPTS/install.sh
+
+# Test to see if the software in question is already installed, if not install it
+echo "Checking to see if the installer script has already been run"
+if command -v cmake; then
+    echo "cmake is already installed"
+else
+	# Download script to install CMake
+	download_url=$(get_github_package_download_url "Kitware/CMake" "endswith(\"inux-x86_64.sh\")")
+	curl -fsSL "${download_url}" -o cmakeinstall.sh
+	# Supply chain security - CMake
+	hash_url=$(get_github_package_download_url "Kitware/CMake" "endswith(\"SHA-256.txt\")")
+	external_hash=$(get_hash_from_remote_file "$hash_url" "linux-x86_64.sh")
+	use_checksum_comparison "cmakeinstall.sh" "$external_hash"
+	# Install CMake and remove the install script
+	chmod +x cmakeinstall.sh \
+	&& ./cmakeinstall.sh --prefix=/usr/local --exclude-subdir \
+	&& rm cmakeinstall.sh
+fi
+
+invoke_tests "Tools" "Cmake"