* Bug: Fully remove `fwupd` from ubuntu images
We're running on VMs in Azure and the fwupd package is not needed.
Leaving it enable means periodic refreshes show in network traffic and firewall logs.
* Update check method
* Simplify test
* [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