Enable GPU usage for MacOS (using MPS)

[R-Palazzo]

Resolve #462
CU-86b6m8pmt

[sdv-team]

Task linked: CU-86b6m8pmt CTGAN - Enable GPU usage for MacOS (using MPS) #462

[codecov]

Codecov Report

❌ Patch coverage is 91.89189% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 86.20%. Comparing base (ccd23ca) to head (4538bce).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
ctgan/synthesizers/_utils.py	87.50%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #464      +/-   ##
==========================================
+ Coverage   85.46%   86.20%   +0.74%     
==========================================
  Files          11       12       +1     
  Lines         791      812      +21     
==========================================
+ Hits          676      700      +24     
+ Misses        115      112       -3     

Flag	Coverage Δ
integration	85.59% <81.08%> (+0.25%)	⬆️
unit	69.70% <75.67%> (+0.93%)	⬆️

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[amontanez24]

Actually I noticed a potential issue with backwards compatibility. If you load a synthesizer from before this change, they won't be able to access the _enable_gpu parameter right?