vm_with_hyperv: disable for s390x

[smitterl]

No HyperV on s390x, disable.

Summary by CodeRabbit

• Tests
  • VM test configuration updated to explicitly exclude the s390-virtio variant for the VM with Hyper-V scenario.
  • This narrows executed test variants for that scenario, reducing irrelevant platform coverage during those tests.

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[coderabbitai]

Walkthrough

A single configuration line "no s390-virtio" was added to libvirt/tests/cfg/cpu/vm_with_hyperv.cfg, excluding the s390-virtio variant from that VM's configuration. This is a configuration-only change; no code, API signatures, or functional implementation were modified.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 3

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The pull request title 'vm_with_hyperv: disable for s390x' accurately describes the main change: disabling the vm_with_hyperv configuration for s390x architecture due to lack of HyperV support.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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