bootstrap: Remove cgroups=disabled from containers.conf

What this PR does / why we need it:

When the workloads cluster was upgraded to cgroups v2, an issue with the vgpu lanes appeared[1]. After some investigation, we suspect that it is due to cgroups being disabled in podman in container setup.

Removing this option does not cause any impact to other workloads so it is not required.

[1] https://prow.ci.kubevirt.io/view/gs/kubevirt-prow/logs/periodic-kubevirt-e2e-kind-1.27-vgpu/1803735246215057408

Which issue(s) this PR fixes (optional, in fixes #<issue number>(, fixes #<issue_number>, ...) format, will close the issue(s) when PR gets merged): Fixes #

Special notes for your reviewer: /cc @xpivarc @dhiller

Checklist

This checklist is not enforcing, but it's a reminder of items that could be relevant to every PR. Approvers are expected to review this list.

[ ] Design: A design document was considered and is present (link) or not required
[ ] PR: The PR description is expressive enough and will help future contributors
[ ] Code: Write code that humans can understand and Keep it simple
[ ] Refactor: You have left the code cleaner than you found it (Boy Scout Rule)
[ ] Upgrade: Impact of this change on upgrade flows was considered and addressed if required
[ ] Testing: New code requires new unit tests. New features and bug fixes require at least on e2e test
[ ] Documentation: A user-guide update was considered and is present (link) or not required. You want a user-guide update if it's a user facing feature / API change.
[ ] Community: Announcement to kubevirt-dev was considered

Release note:

kubevirt / project-infra

bootstrap: Remove cgroups=disabled from containers.conf #3515