[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-postgresql.sh

@@ -0,0 +1,37 @@
+#!/bin/bash -e
+################################################################################
+##  File:  install-postgresql.sh
+##  Desc:  Install PostgreSQL
+################################################################################
+
+# Source the helpers
+source $HELPER_SCRIPTS/os.sh
+source $HELPER_SCRIPTS/install.sh
+
+REPO_URL="https://apt.postgresql.org/pub/repos/apt/"
+
+# Preparing repo for PostgreSQL
+wget -qO - https://www.postgresql.org/media/keys/ACCC4CF8.asc | gpg --dearmor > /usr/share/keyrings/postgresql.gpg
+echo "deb [signed-by=/usr/share/keyrings/postgresql.gpg] $REPO_URL $(getOSVersionLabel)-pgdg main" > /etc/apt/sources.list.d/pgdg.list
+
+# Fetch PostgreSQL version to install from the toolset
+toolsetVersion=$(get_toolset_value '.postgresql.version')
+
+# Install PostgreSQL
+echo "Install PostgreSQL"
+apt update
+apt install postgresql-$toolsetVersion
+
+echo "Install libpq-dev"
+apt-get install libpq-dev
+
+# Disable postgresql.service
+systemctl is-active --quiet postgresql.service && systemctl stop postgresql.service
+systemctl disable postgresql.service
+
+rm /etc/apt/sources.list.d/pgdg.list
+rm /usr/share/keyrings/postgresql.gpg
+
+echo "postgresql $REPO_URL" >> $HELPER_SCRIPTS/apt-sources.txt
+
+invoke_tests "Databases" "PostgreSQL"