Refactor DataDisplay to a function component

[bjoernricks]

What

Refactor DataDisplay to a function component

Convert the DataDisplay class component to a function component and keep its current behavior.

Why

Function components are easier to understand and to maintain.

References

https://jira.greenbone.net/browse/GEA-2019

Checklist

• I have added tests for the changes
• I have used the following LLMs/AI tools in this pull request:

[github-actions]

Dependency Review

✅ No vulnerabilities or license issues or OpenSSF Scorecard issues found.

Snapshot Warnings

⚠️: No snapshots were found for the head SHA 55d62b3.

Ensure that dependencies are being submitted on PR branches and consider enabling retry-on-snapshot-warnings. See the documentation for more information and troubleshooting advice.

Scanned Files

None

[codecov]

Codecov Report

❌ Patch coverage is 96.29630% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 87.05%. Comparing base (34c1581) to head (55d62b3).
⚠️ Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...c/web/components/dashboard/display/DataDisplay.tsx	96.25%	3 Missing ⚠️

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #5658   +/-   ##
=======================================
  Coverage   87.05%   87.05%           
=======================================
  Files        1304     1304           
  Lines       34103    34093   -10     
  Branches    10235    10196   -39     
=======================================
- Hits        29688    29681    -7     
+ Misses       3978     3975    -3     
  Partials      437      437           

☔ View full report in Codecov by Harness.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.