To make it easier to maintain the jobs all experimental
jobs (those which are not run in check and gate pipelines)
are moved to a separate file. They will be revised later
to use the same deploy-env role.
Also many charts use Openstack images for testing this
PR adds 2023.1 Ubuntu Focal overrides for all these charts.
Change-Id: I4a6fb998c7eb1026b3c05ddd69f62531137b6e51
ae91cf3fc3