feat: support query group by(#3177)

[MrPresent-Han]

related: #3177

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[codecov]

Codecov Report

❌ Patch coverage is 20.00000% with 8 lines in your changes missing coverage. Please review.
⚠️ Please upload report for BASE (master@5d377b2). Learn more about missing BASE report.

Files with missing lines	Patch %	Lines
pymilvus/client/prepare.py	0.00%	7 Missing ⚠️
pymilvus/client/entity_helper.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##             master    #3178   +/-   ##
=========================================
  Coverage          ?   46.74%           
=========================================
  Files             ?       68           
  Lines             ?    14820           
  Branches          ?        0           
=========================================
  Hits              ?     6927           
  Misses            ?     7893           
  Partials          ?        0           

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[XuanYang-cn]

Plz move this example into orm_deprecated, and add a new example using MilvusClient

[XuanYang-cn]

plz change as the comment