[release/9.0] Add do...while loop in the SetValue method of SerializationResourceManager.cs until resourceName is unique

[github-actions]

Backport of #13578 to release/9.0

Fixes #12595

Proposed changes

Replaces single conditional append with a do…while loop to retry name generation to ensures that SetValue in SerializationResourceManager.cs repeatedly generates a new resourceName until it’s unique, fixing duplicate suffixes when serializing collections.

Customer Impact

• When serializing collection values, the resource numeric suffix can be incremented without duplication

Regression?

• Yes, introduced in Refactor SerializationResourceManager to use Dictionary instead of HashTable #8332

Testing

• Manual testing with the user-provided project

Risk

• Low

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 7 lines in your changes missing coverage. Please review.

Project coverage is 74.85402%. Comparing base (615dd68) to head (7a093b4).

Additional details and impacted files

@@                  Coverage Diff                  @@
##           release/9.0      #13615         +/-   ##
=====================================================
+ Coverage     74.85339%   74.85402%   +0.00063%     
=====================================================
  Files             3022        3022                 
  Lines           630570      630574          +4     
  Branches         46810       46811          +1     
=====================================================
+ Hits            472003      472010          +7     
- Misses          155171      155173          +2     
+ Partials          3396        3391          -5     

Flag	Coverage Δ
Debug	74.85402% <0.00000%> (+0.00063%)	⬆️
integration	18.01320% <0.00000%> (-0.00732%)	⬇️
production	47.90295% <0.00000%> (+0.00178%)	⬆️
test	96.99900% <ø> (ø)
unit	44.93589% <0.00000%> (+0.00500%)	⬆️

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