Clear and concise description of the problem

Follow-up of #9952.

Suggested solution

Change default value of attachmentsDir to follow the new convention. Also update all examples that use actions/upload-artifact to upload just .vitest now.

Alternative

No response

Additional context

No response

Validations

• Follow our Code of Conduct
• Read the Contributing Guidelines.
• Read the docs.
• Check that there isn't already an issue that requests the same feature to avoid creating a duplicate.