WIP: Update DRVI and align with the latest scvi-tools version

[moinfar]

Steps:

• Relax all dependencies
• Align with the latest scvi-tools
• Automatic tests passed
• Check backward compatibility
• Test and make sure metrics match
• Test to see if additional features (new in scvi-tools) work with no problem.
• Put limits on dependencies with respect to the newest packages.

Goal: solve #22

[codecov]

Codecov Report

❌ Patch coverage is 59.59596% with 40 lines in your changes missing coverage. Please review.
✅ Project coverage is 68.95%. Comparing base (90a5c73) to head (533aeb7).
⚠️ Report is 28 commits behind head on main.

Files with missing lines	Patch %	Lines
src/drvi/scvi_tools_based/module/_constants.py	32.35%	23 Missing ⚠️
...c/drvi/scvi_tools_based/model/base/_archesmixin.py	72.00%	7 Missing ⚠️
src/drvi/scvi_tools_based/module/_drvi.py	80.00%	4 Missing ⚠️
...i/scvi_tools_based/model/base/_generative_mixin.py	50.00%	3 Missing ⚠️
src/drvi/scvi_tools_based/model/_drvi.py	80.00%	2 Missing ⚠️
src/drvi/nn_modules/prior.py	50.00%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #33      +/-   ##
==========================================
- Coverage   69.57%   68.95%   -0.62%     
==========================================
  Files          49       50       +1     
  Lines        2524     2580      +56     
==========================================
+ Hits         1756     1779      +23     
- Misses        768      801      +33     

Files with missing lines	Coverage Δ
src/drvi/scvi_tools_based/nn/_base_components.py	84.06% <100.00%> (-0.05%)	⬇️
...i/utils/tools/interpretability/_latent_traverse.py	93.75% <100.00%> (ø)
src/drvi/nn_modules/prior.py	89.13% <50.00%> (+0.11%)	⬆️
src/drvi/scvi_tools_based/model/_drvi.py	69.62% <80.00%> (-6.44%)	⬇️
...i/scvi_tools_based/model/base/_generative_mixin.py	76.28% <50.00%> (+0.24%)	⬆️
src/drvi/scvi_tools_based/module/_drvi.py	80.87% <80.00%> (+0.10%)	⬆️
...c/drvi/scvi_tools_based/model/base/_archesmixin.py	72.10% <72.00%> (+0.25%)	⬆️
src/drvi/scvi_tools_based/module/_constants.py	32.35% <32.35%> (ø)

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