fix: sets a fixed node version for SonarCloud scans

[christopherferreira9]

Explanation

• Fixes the SonarCloud integration by using the new action (old one is getting deprecated)
• Adds coverage for Multichain packages.

References

Checklist

• I've updated the test suite for new or updated code as appropriate
• I've updated documentation (JSDoc, Markdown, etc.) for new or updated code as appropriate
• I've highlighted breaking changes using the "BREAKING" category above as appropriate

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 74.93%. Comparing base (22b64c7) to head (6ff644d).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1349   +/-   ##
=======================================
  Coverage   74.93%   74.93%           
=======================================
  Files         184      184           
  Lines        4513     4513           
  Branches     1105     1105           
=======================================
  Hits         3382     3382           
  Misses       1131     1131           

☔ View full report in Codecov by Sentry.
📢 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.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud