lca ipc: update the dns validation

[achuzhoy]

This change follows the upstream Kubernetes apimachinery update that now passes the real value to field.Invalid(), resulting in error messages like Invalid value: "192.168.130.261" instead of Invalid value: "string".

Summary by CodeRabbit

• Tests
  • Refined DNS server configuration validation error messages to include the specific invalid IP address value, providing more informative feedback when misconfiguration occurs.

[achuzhoy]

cc @trewest

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

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Run ID: 28be6d32-21ae-4af2-8192-1401160f6789

📥 Commits

Reviewing files that changed from the base of the PR and between 2a82a3f and e06a065.

📒 Files selected for processing (1)

• tests/lca/ipchange/tests/ipconfig-test.go

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📝 Walkthrough

Walkthrough

A test case validation in the IP configuration test file is updated to use the actual bad IP value constant instead of a fixed substring reference when asserting expected error messages. One line of test assertion logic is modified.

Changes

Cohort / File(s)	Summary
DNS Server Validation Test tests/lca/ipchange/tests/ipconfig-test.go	Updated expected error message format for spec.dnsServers[0] validation to dynamically construct the error substring using tsparams.BadIPv4Address constant instead of a fixed string reference.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

🚥 Pre-merge checks | ✅ 5

✅ Passed checks (5 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title 'lca ipc: update the dns validation' directly relates to the changeset, which updates a DNS validation test case to match an upstream Kubernetes change in error message formatting.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

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