Make an exception for DocDB Cluster Port return type

[kddejong]

Issue #, if available:
fix #3757
Description of changes:

• Make an exception for DocDB Cluster Port return type

By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 93.75%. Comparing base (03c8c46) to head (5e7280c).
Report is 1 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3759      +/-   ##
==========================================
+ Coverage   93.74%   93.75%   +0.01%     
==========================================
  Files         362      362              
  Lines       12351    12353       +2     
  Branches     2519     2520       +1     
==========================================
+ Hits        11578    11582       +4     
+ Misses        431      429       -2     
  Partials      342      342              

Flag	Coverage Δ
unittests	93.71% <100.00%> (+0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

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