Merge pull request #56349 from rhcs-dashboard/add-landing-page-upgrade-notification

mgr/dashboard: add upgrade notification

Reviewed-by: Ankush Behl <cloudbehl@gmail.com>
Reviewed-by: Nizamudeen A <nia@redhat.com>

diff --cc src/pybind/mgr/dashboard/frontend/src/app/ceph/dashboard-v3/dashboard/dashboard-v3.component.ts
Simple merge