[SYSDATA] add sysdata offset service

RAUC is the official tool used for Clea OS System Updates. Since it is not a mandatory feature in the distribution, the default configuration does not support any system updates. To enable RAUC, the configurator must be used:

Clea OS Distro Settings > Clea OS Distro Features Menu

Currently, two options are available:

- None: No system update functionality is included.
- RAUC System Update: Enables RAUC for system updates.

Note: This feature will be mandatory for the "Things" flavor of Clea OS.

JIRA Reference:[CLEAOS-644]

Signed-off-by: Davide Cardillo davide.cardillo@seco.com