Our current approach of package builds thorugh docker images do not
scale well as every time a new build dependency for a package is
introduced, the same needs to be added to the docker package builder
image and the image be regenerated.

Drop the entire packaging/ folder
Also drop corresponding folders from apertis-folders.yaml

A different approach is being tracked in APETIS-5580

Signed-off-by: Ritesh Raj Sarraf <ritesh.sarraf@collabora.com>