fix: gocli startup in s390x architecture

[nestoracunablanco]

The gocli container image is multi-architecture compatible; however, it attempts to download the k8s-1.30 image, which is not available for the s390x architecture. The k8s-1.30-slim image, on the other hand, is compatible. To enable support for s390x, we can enforce the use of the --slim parameter for this architecture.

Release note:

NONE

[kubevirt-bot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by:
Once this PR has been reviewed and has the lgtm label, please assign davidvossel for approval. For more information see the Kubernetes Code Review Process.

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[brianmcarey]

/cc @chandramerla

[nestoracunablanco]

/test check-provision-k8s-1.31

[nestoracunablanco]

/test check-provision-k8s-1.31

[kubevirt-bot]

@nestoracunablanco: The following tests failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
check-provision-k8s-1.31-s390x	c7887ca	link	false	/test check-provision-k8s-1.31-s390x
check-up-kind-sriov	c7887ca	link	false	/test check-up-kind-sriov
check-provision-k8s-1.32	c7887ca	link	true	/test check-provision-k8s-1.32
check-provision-k8s-1.30	c7887ca	link	true	/test check-provision-k8s-1.30
check-provision-k8s-1.31	c7887ca	link	true	/test check-provision-k8s-1.31

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.