fix(ai-proxy): dashscope non-stream support vlm multipart

[sfwn]

What this PR does / why we need it:

dashscope non-stream support vlm multipart

Which issue(s) this PR fixes:

• Erda Cloud Issue Link

ChangeLog

Language	Changelog
🇺🇸 English	ai-proxy: dashscope non-stream support vlm multipart
🇨🇳 中文	ai-proxy: 灵积非流式支持 vlm multipart

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 15.16%. Comparing base (2270271) to head (250412f).
Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6465   +/-   ##
=======================================
  Coverage   15.16%   15.16%           
=======================================
  Files        3674     3674           
  Lines      376905   376905           
=======================================
+ Hits        57145    57151    +6     
+ Misses     314298   314293    -5     
+ Partials     5462     5461    -1     

Flag	Coverage Δ
by-github-actions	15.16% <ø> (+<0.01%)	⬆️

Flags with carried forward coverage won't be shown. Click here to find out more.

see 9 files with indirect coverage changes