Also:
* Remove openstack-helm-infra from job definitions
* Use public.ecr.aws/ubuntu/ubuntu as base image registry
* Use Ubuntu Noble Ceph packages out of the box
* Remove 2024.2 unnecessary customization (needed to install unreleases
bug fix)
Change-Id: I2b855e41ca99d5e413384f20c63a9bf9eb7696d0