Use 1.1.1 branch with ci-tweaks for upgrade tests

Francois Eleouetrequested to merge
bp-libvirt-metal-ci-fix into main

What does this MR do and why?

Use branch containing backport of !2948 (merged) on top of 1.1.1 as starting point for upgrade tests.

Depends on !2953 (merged)

Relates to #1661 (closed)

Merge request reports