migration/canonical_paths: disable on s390x

[smitterl]

None of the tests applies to s390x: no UEFI, no NVRAM, no TPM.

Summary by CodeRabbit

• Chores
  • Updated migration test configurations to refine architecture-specific exclusions for improved test coverage and reliability.

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[coderabbitai]

Walkthrough

The changes modify test configuration exclusions in the migration shared-filesystems test file. A new "no s390-virtio" exclusion was added under the migrate_vm_back section, while s390-virtio was simultaneously removed from the boot-type bios variant exclusion list, which now contains only "no aarch64". These adjustments alter which architecture variants are tested in specific migration scenarios.

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~8 minutes

• Configuration file modifications with straightforward exclusion list changes
• Changes involve moving/reordering architecture-specific exclusions across test variants
• Verify that the moved exclusion (s390-virtio removal from bios variant) aligns with intended test coverage for both the migrate_vm_back and boot-type sections

Pre-merge checks and finishing touches

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately and concisely describes the main objective of the pull request: disabling the migration/canonical_paths tests on s390x architecture.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

✨ Finishing touches

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📥 Commits

Reviewing files that changed from the base of the PR and between f5225cd and 2087597.

📒 Files selected for processing (1)

• libvirt/tests/cfg/migration/migration_misc/canonical_paths_in_shared_filesystems.cfg (2 hunks)

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🔇 Additional comments (2)

libvirt/tests/cfg/migration/migration_misc/canonical_paths_in_shared_filesystems.cfg (2)

49-50: Top-level no s390-virtio correctly encodes the s390x disablement intent

Adding the no s390-virtio at the test level cleanly disables all variants of this canonical_paths test on s390x, which matches the PR description (no UEFI/NVRAM/TPM there). This is a good central place to express the architecture-wide exclusion, rather than per-variant.

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58-61: Removing s390-virtio from the BIOS variant’s no list is consistent cleanup

Given the new top-level no s390-virtio, dropping it from the BIOS boot_type no list just removes redundancy while keeping the existing semantics for non-s390x (still excluding aarch64 only). This change looks correct assuming s390-virtio is the only s390x env used for this test matrix.

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[dzhengfy]

LGTM