Move strong_ssl_ciphers to top level in harbor.yml

[stonezdj]

fixes #19912

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Comprehensive Summary of your change

Issue being fixed

Fixes #(issue)

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 67.41%. Comparing base (b622d4a) to head (c4e5235).
Report is 24 commits behind head on release-2.9.0.

Additional details and impacted files

@@                Coverage Diff                @@
##           release-2.9.0   #20021      +/-   ##
=================================================
- Coverage          67.42%   67.41%   -0.01%     
=================================================
  Files                993      993              
  Lines             108932   108990      +58     
  Branches            2752     2752              
=================================================
+ Hits               73444    73473      +29     
- Misses             31534    31555      +21     
- Partials            3954     3962       +8     

Flag	Coverage Δ
unittests	67.41% <ø> (-0.01%)	⬇️

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see 15 files with indirect coverage changes

[wy65701436]

lgtm