Add group_by parameter to bm25 and hybrid

[tsmith023]

core PR: weaviate/weaviate#4477

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[codecov-commenter]

Codecov Report

Attention: Patch coverage is 58.44156% with 32 lines in your changes are missing coverage. Please review.

Project coverage is 94.83%. Comparing base (339f7ad) to head (622da77).

Files	Patch %	Lines
integration/test_collection_openai.py	20.00%	20 Missing ⚠️
integration/test_collection.py	84.00%	4 Missing ⚠️
weaviate/collections/queries/bm25/generate.py	40.00%	3 Missing ⚠️
weaviate/collections/queries/hybrid/generate.py	40.00%	3 Missing ⚠️
weaviate/collections/queries/bm25/query.py	80.00%	1 Missing ⚠️
weaviate/collections/queries/hybrid/query.py	80.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff              @@
##           dev/1.25     #978      +/-   ##
============================================
- Coverage     95.00%   94.83%   -0.17%     
============================================
  Files           175      175              
  Lines         18022    18089      +67     
============================================
+ Hits          17122    17155      +33     
- Misses          900      934      +34     

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