feat: support-streaming-partial-tools

[koxudaxi]

closes: #711

[koxudaxi]

@willbakst
One more thing. mistral apparently always returns the complete tools in stream. In other words, we will not provide this option for mistral, since it will never be delta.

[koxudaxi]

@willbakst
Also groq seems to behave the same way as mistral.
In other words, this seems to be a special behavior only for openai.

[willbakst]

@willbakst

Also groq seems to behave the same way as mistral.

In other words, this seems to be a special behavior only for openai.

I know for sure that Anthropic also supports this

[koxudaxi]

OK, I have confirmed Anthropic return partial tools.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 100.00%. Comparing base (4365d60) to head (514dba4).
Report is 13 commits behind head on release/v1.11.

Additional details and impacted files

@@               Coverage Diff               @@
##           release/v1.11      #718   +/-   ##
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  Coverage         100.00%   100.00%           
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  Files                398       399    +1     
  Lines              13292     13390   +98     
===============================================
+ Hits               13292     13390   +98     

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