Fix Mixed Cluster Config Update Bug

[abraakie]

Description

[Describe what this change achieves]

• Category: Bug fix

Issues Resolved

#5365

Testing

added bwc test

Check List

• New functionality includes testing
• New functionality has been documented
• New Roles/Permissions have a corresponding security dashboards plugin PR
• Commits are signed per the DCO using --signoff

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.41%. Comparing base (5585a80) to head (3549dca).

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #5437      +/-   ##
==========================================
- Coverage   72.42%   72.41%   -0.02%     
==========================================
  Files         393      393              
  Lines       24286    24286              
  Branches     3714     3714              
==========================================
- Hits        17590    17587       -3     
- Misses       4868     4870       +2     
- Partials     1828     1829       +1     

see 6 files with indirect coverage changes

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