fix: address failing tests on Ubuntu

[nestoracunablanco]

The templates generated for Ubuntu are not of the tiny variant. The end-to-end tests attempted to run them but failed silently.

What this PR does / why we need it: s390x enablement

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:

Release note:

NONE

[openshift-ci]

Hi @nestoracunablanco. Thanks for your PR.

I'm waiting for a kubevirt member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

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[0xFelix]

/ok-to-test

[nestoracunablanco]

/retest

[0xFelix]

/approve
/lgtm

[kubevirt-bot]

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