[release/9.0] Fix issue 14259: Deserialization of the CodeTypeReference to generic type is incorrect

[aerworker]

Backport of #14260 to release/9.0
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 74.86310%. Comparing base (f48f8bf) to head (aff3cbe).
⚠️ Report is 2 commits behind head on release/9.0.

Additional details and impacted files

@@                  Coverage Diff                   @@
##           release/9.0      #14270          +/-   ##
======================================================
+ Coverage     47.90874%   74.86310%   +26.95436%     
======================================================
  Files             1956        3022        +1066     
  Lines           284422      630591      +346169     
  Branches         41761       46811        +5050     
======================================================
+ Hits            136263      472080      +335817     
- Misses          145502      155127        +9625     
- Partials          2657        3384         +727     

Flag	Coverage Δ
Debug	74.86310% <100.00000%> (+26.95436%)	⬆️
integration	18.02589% <0.00000%> (+0.00028%)	⬆️
production	47.92158% <100.00000%> (+0.01283%)	⬆️
test	96.99914% <100.00000%> (?)
unit	44.92218% <100.00000%> (+0.01249%)	⬆️

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