Fix native support generic service

[eye-gu]

What is the purpose of the change?

close #14499

Checklist

• Make sure there is a GitHub_issue field for the change.
• Write a pull request description that is detailed enough to understand what the pull request does, how, and why.
• Write necessary unit-test to verify your logic correction. If the new feature or significant change is committed, please remember to add sample in dubbo samples project.
• Make sure gitHub actions can pass. Why the workflow is failing and how to fix it?

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 0% with 8 lines in your changes missing coverage. Please review.

Project coverage is 60.71%. Comparing base (dddeb25) to head (f688cfc).
Report is 14 commits behind head on 3.3.

Files with missing lines	Patch %	Lines
.../dubbo/rpc/aot/GenericProxyDescriberRegistrar.java	0.00%	8 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                3.3   #15139      +/-   ##
============================================
- Coverage     60.71%   60.71%   -0.01%     
- Complexity    10879    10883       +4     
============================================
  Files          1884     1885       +1     
  Lines         86050    86058       +8     
  Branches      12893    12893              
============================================
+ Hits          52249    52250       +1     
- Misses        28347    28356       +9     
+ Partials       5454     5452       -2     

Flag	Coverage Δ
integration-tests	33.08% <0.00%> (+<0.01%)	⬆️
samples-tests	29.20% <0.00%> (+0.01%)	⬆️
unit-tests	58.82% <0.00%> (+<0.01%)	⬆️

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[FoghostCn]

LGTM

[AlbumenJ]

@CrazyHZM PTAL