Allow using rpi-imager config

• Can now use the config file for bb-imager to create entries for the linux sd card based flashing
• Merge the original bb-imager config with the config present in this repo.
• Also cleanup config to allow easier support for remote configuration.

Signed-off-by: Ayush Singh ayush@beagleboard.org

enabled an automatic merge when the pipeline for dab8580a succeeds

mentioned in commit bf61a287

merged