test: add a11y tests for local authority risks page

[J05h-L]

🧾 Summary

Adds a11y test coverage for the Local Authority Risks page.

AB#317736
AB#324314

✅ Checklist

• Code follows project coding standards (e.g., Trunk-based guidelines, small PR size).
• Unit and integration tests added/updated (if applicable).
• Tested by running locally (or docs render correctly locally).
• Relevant documentation updated (if applicable).
• Screenshots or Demo included (for UI/frontend changes).

🔍 Notes

This PR also includes the seed data as a csv added for d02 for the a11y tests for this page as well as the expected data needed for the functional api tests

[github-actions]

✅ All checks have passed!

Checklist

• Branch naming matches the standard (<category>/[<backlog-item>/][<task>-]description-in-kebab-case)
• Has at least one label attached
• Title matches Conventional Commits (<type>(<optional-scope>): <description>)
• Linked to an ADO ticket (contains AB#<ticket-number>)
• Markdown files pass linting