Skip failing CY test in ai_assistant

[KDKHD]

Summary

This cypress test is using a connector with a dummy URL (goodurl.com). According to icann.org this URL was updated this morning (someone likely registered it) and now the domain is returning a response that can not be parsed causing the test to fail. It was expected that this URL would return an error response.

Checklist

Check the PR satisfies following conditions.

Reviewers should verify this PR satisfies this list as well.

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
• If a plugin configuration key changed, check if it needs to be allowlisted in the cloud and added to the docker list
• This was checked for breaking HTTP API changes, and any breaking changes have been approved by the breaking-change committee. The release_note:breaking label should be applied in these situations.
• Flaky Test Runner was used on any tests changed
• The PR description includes the appropriate Release Notes section, and the correct release_note:* label is applied per the guidelines

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[elasticmachine]

💚 Build Succeeded

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• Commit: 684eb1d

Metrics [docs]

✅ unchanged

[KDKHD]

Resolved here: #204404