[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-erlang.sh

@@ -0,0 +1,29 @@
+#!/bin/bash -e
+################################################################################
+##  File:  install-erlang.sh
+##  Desc:  Install erlang and rebar3
+################################################################################
+
+# Source the helpers for use with the script
+source $HELPER_SCRIPTS/install.sh
+
+source_list=/etc/apt/sources.list.d/eslerlang.list
+source_key=/usr/share/keyrings/eslerlang.gpg
+
+# Install Erlang
+wget -q -O - https://packages.erlang-solutions.com/ubuntu/erlang_solutions.asc | gpg --dearmor > $source_key
+echo "deb [signed-by=$source_key]  https://packages.erlang-solutions.com/ubuntu $(lsb_release -cs) contrib" > $source_list
+apt-get update
+
+apt-get install --no-install-recommends esl-erlang
+
+# Install rebar3
+rebar3_url="https://github.com/erlang/rebar3/releases/latest/download/rebar3"
+download_with_retries $rebar3_url "/usr/local/bin" "rebar3"
+chmod +x /usr/local/bin/rebar3
+
+# Clean up source list
+rm $source_list
+rm $source_key
+
+invoke_tests "Tools" "erlang"