chore(ai-proxy): add model template for gpt-5.1 & gpt-5.2

[sfwn]

What this PR does / why we need it:

AI-Proxy add model template for gpt-5.1 & gpt-5.2.

Which issue(s) this PR fixes:

• Erda Cloud Issue Link

ChangeLog

Language	Changelog
🇺🇸 English	AI-Proxy add model template for gpt-5.1 & gpt-5.2
🇨🇳 中文	AI-Proxy 增加模型模板：gpt-5.1 & gpt-5.2

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 14.82%. Comparing base (a02eb54) to head (d19fb9f).
⚠️ Report is 1 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #6655   +/-   ##
=======================================
  Coverage   14.82%   14.82%           
=======================================
  Files        3897     3897           
  Lines      321886   321886           
=======================================
  Hits        47728    47728           
  Misses     268688   268688           
  Partials     5470     5470           

Flag	Coverage Δ
by-github-actions	14.82% <ø> (ø)

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