Replace threading.Lock with asyncio.Lock when batching to avoid deadlocks

[tsmith023]

• Changes all threading.Locks in async def fns to asyncio.Lock to avoid blocking the event loop
• Changes all time.sleep()s in async def fns to asyncio.sleep() to avoid blocking the event loop
• Improves logging when errors occur during the batching logic
• Uses BatchObject instead of _BatchObject in ErrorObject and BatchReference instead of _BatchReference in ErrorReference for easier usage of errors

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 87.50000% with 5 lines in your changes missing coverage. Please review.

Project coverage is 93.93%. Comparing base (3f68082) to head (feb148a).
Report is 166 commits behind head on main.

Files with missing lines	Patch %	Lines
weaviate/collections/classes/batch.py	82.35%	3 Missing ⚠️
weaviate/collections/batch/base.py	90.00%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1270      +/-   ##
==========================================
- Coverage   94.38%   93.93%   -0.45%     
==========================================
  Files         220      221       +1     
  Lines       20956    21302     +346     
==========================================
+ Hits        19779    20010     +231     
- Misses       1177     1292     +115     

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[tsmith023]

Closing in favour of #1371