Signed-off-by: Dylan Aïssi <dylan.aissi@collabora.com>

These being essential packages, a script is needed to backup binaries
used to do the upgrade.

Signed-off-by: Detlev Casanova <detlev.casanova@collabora.com>

These tools are moved from
`infrastructure/apertis-docker-images/package-source-builder`.

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

This tool is moved from `infrastructure/packaging-tools`.

Signed-off-by: Frédéric Danis <frederic.danis@collabora.com>

Signed-off-by: Andrej Shadura <andrew.shadura@collabora.co.uk>

Signed-off-by: Louis-Francis Ratté-Boulianne <lfrb@collabora.com>

Differential Revision: https://phabricator.apertis.org/D4766

Signed-off-by: Louis-Francis Ratté-Boulianne <lfrb@collabora.com>

Differential Revision: https://phabricator.apertis.org/D4761