Fix issue 14259: Deserialization of the CodeTypeReference to generic type is incorrect

[aerworker]

Fixes #14259

Proposed changes

• Fixed a regression where CodeDomSerializer doesn't deserialize generic types.

Customer Impact

• When a custom designer tries to deserialize a generic type the error is occuered

Regression?

• Yes

Risk

• Min

Test methodology

• custom example

Test environment(s)

8.0.23

Microsoft Reviewers: Open in CodeFlow

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 77.18350%. Comparing base (333771d) to head (bdaf691).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@                 Coverage Diff                 @@
##                main      #14260         +/-   ##
===================================================
+ Coverage   77.17929%   77.18350%   +0.00421%     
===================================================
  Files           3279        3279                 
  Lines         645129      645156         +27     
  Branches       47728       47730          +2     
===================================================
+ Hits          497906      497954         +48     
+ Misses        143540      143505         -35     
- Partials        3683        3697         +14     

Flag	Coverage Δ
Debug	77.18350% <100.00000%> (+0.00421%)	⬆️
integration	18.98744% <0.00000%> (+0.00561%)	⬆️
production	52.06092% <100.00000%> (+0.00896%)	⬆️
test	97.40492% <100.00000%> (+0.00012%)	⬆️
unit	49.52365% <100.00000%> (+0.03303%)	⬆️

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