Feature 10884: Juju 2.9 support

OSM LTS Support

- Update osm bundles (charmed)
- Update Juju version (snap and agent version) (charmed and k8s)
- Update to new mongodb charm (charmed and k8s)
- Fix ingress issue by adding an ingress_class config
- Charmed installer: point to local bundles until all charms are in
CharmHub
Change-Id: I6ff8328e5db6719bbf9d5d4c9b5490f478b2ace8
Signed-off-by: David Garcia <david.garcia@canonical.com>