Fix stage3 issues: obsolete k8s deb packages and mongodb charm version

The change updates LCM Dockerfile and OSM installer to use Kubernetes
version 1.28 instead of 1.26.

In addition, mongodb is installed from 6/stable channel instead of
latest/stable

Change-Id: Ib67654765ddec0990af70404f7f8a7fff68bd1ef
Signed-off-by: garciadeblas <gerardo.garciadeblas@telefonica.com>
2 files changed