feat: add shared memory for DDP data deduplication

[ori-kron-wis]

No description provided.

[codecov]

Codecov Report

❌ Patch coverage is 45.40230% with 95 lines in your changes missing coverage. Please review.
✅ Project coverage is 82.88%. Comparing base (c8e16ac) to head (407ccc2).

Files with missing lines	Patch %	Lines
src/scvi/dataloaders/_shared_memory.py	45.65%	75 Missing ⚠️
src/scvi/dataloaders/_data_splitting.py	56.52%	10 Missing ⚠️
src/scvi/train/_trainrunner.py	23.07%	10 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #3754      +/-   ##
==========================================
- Coverage   88.55%   82.88%   -5.68%     
==========================================
  Files         241      256      +15     
  Lines       23722    26149    +2427     
==========================================
+ Hits        21007    21673     +666     
- Misses       2715     4476    +1761     

Flag	Coverage Δ
integration	74.47% <45.40%> (-0.22%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
src/scvi/dataloaders/_data_splitting.py	92.93% <56.52%> (-3.41%)	⬇️
src/scvi/train/_trainrunner.py	76.25% <23.07%> (-5.49%)	⬇️
src/scvi/dataloaders/_shared_memory.py	45.65% <45.65%> (ø)

... and 37 files with indirect coverage changes

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