[Feat]Modifying the expert part of the Qwen3VLMoe

[w-yyh]

PR types

feat

PR changes

修改qwen3vlmoe模型的expert部分，gate由之前的直接初始化parameter修改为使用TopKRouter类

[paddle-bot]

Thanks for your contribution!

[codecov-commenter]

Codecov Report

❌ Patch coverage is 96.66667% with 1 line in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (develop@626dafd). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
...addleformers/transformers/qwen3_vl_moe/modeling.py	96.66%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             develop    #3753   +/-   ##
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  Coverage           ?   32.67%           
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  Files              ?      431           
  Lines              ?    82101           
  Branches           ?        0           
==========================================
  Hits               ?    26828           
  Misses             ?    55273           
  Partials           ?        0           

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[w-yyh]

/re-run all-failed

[lugimzzz]

LGTM