Revert "Enabling kubevirt and dependent units in capm3 libvirt-metal CI"
This reverts merge request !1274 (merged) to unbreak CI.
The reason is that this upgrade breaks the "Upgrade from 1.1.0 to main" nightly jobs.
https://gitlab.com/sylva-projects/sylva-core/-/jobs/6992932826#L78
/cc @manik.bindlish there is nothing wrong in !1274 (merged) per-se, it's really more that the addition of this new CI file breaks how our CI pipeline tests upgrades from older sylva release that don't have this file
/cc @loic.nicolle -- we need to find a way to have this upgrade CI job not try to use new CI config on old branches, this isn't a trivial topic
/cc @marc.bailly1