fix: resolve method descriptor return early matching logic #16330

[LI123456mo]

What is the purpose of the change?

Checklist

• This PR focuses on early return if the the method is "isGeneric()" instead of waiting the final return , which is consistent with the "isEcho()"

[codecov-commenter]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 60.79%. Comparing base (866860d) to head (b903ac2).

Files with missing lines	Patch %	Lines
...apache/dubbo/rpc/protocol/tri/DescriptorUtils.java	0.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##                3.3   #16346      +/-   ##
============================================
- Coverage     60.80%   60.79%   -0.02%     
- Complexity       15    11769   +11754     
============================================
  Files          1953     1953              
  Lines         89208    89208              
  Branches      13458    13458              
============================================
- Hits          54245    54236       -9     
- Misses        29397    29405       +8     
- Partials       5566     5567       +1     

Flag	Coverage Δ
integration-tests-java21	32.17% <0.00%> (+0.06%)	⬆️
integration-tests-java8	32.30% <0.00%> (+<0.01%)	⬆️
samples-tests-java21	32.17% <0.00%> (-0.02%)	⬇️
samples-tests-java8	29.85% <0.00%> (+0.12%)	⬆️
unit-tests-java11	59.05% <0.00%> (+0.02%)	⬆️
unit-tests-java17	58.50% <0.00%> (-0.02%)	⬇️
unit-tests-java21	58.49% <0.00%> (-0.01%)	⬇️
unit-tests-java25	58.49% <0.00%> (+0.04%)	⬆️
unit-tests-java8	59.05% <0.00%> (-0.01%)	⬇️

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