Improve/fix the building of FluiddPi images based off Armbian
Use pkgupgrade module from CustomPiOS instead of releaseinfochange
releaseinfochange module isn't handling changes to configuration files well,
prompting for user input during the build process. The CustomPiOS module
pkgupgrade provides the same functionality and handles user input requests
better.
Fix Moonraker install
The Moonraker sudo_fix.sh script is broken when the user doesn't have
password-less sudo enabled. Ensure that the pi user can sudo without
prompting for a password for the duration of the build process.
Rework .gitignore to ignore armbian build images
Building variants uses different image and workspace directories, cover
these in the .gitignore rules.
Improve/fix the building of FluiddPi images based off Armbian