- add non-voting focal-xena bundle
- add non-voting impish-xena bundle
- rebuild to pick up charm-helpers changes
- remove groovy-victoria bundles from gate
- Ensure that the cs:~ionutbalutoiu/test-saml-idp charm is on
series focal for the hirsute and impish bundles as the charm only
supports LTS releases.
Change-Id: I92743ca40cb58f5998b16a9d79e8f8197c4f4181