Check asset audits against MySQL 8.4

[dn10-sanger]

This pull request reflects changes to mysql image from 8.0 to 8.4 in CI workflow to verify asset audits is compatible with the MySQL 8.4 upgrade.

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 93.49%. Comparing base (e7190e0) to head (9113379).
⚠️ Report is 57 commits behind head on develop.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop     #923   +/-   ##
========================================
  Coverage    93.49%   93.49%           
========================================
  Files           84       84           
  Lines         1537     1537           
========================================
  Hits          1437     1437           
  Misses         100      100           

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