Implement Cast in PyTorch backend

[ricardoV94]

Related to #821

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📚 Documentation preview 📚: https://pytensor--1023.org.readthedocs.build/en/1023/

[codecov]

Codecov Report

Attention: Patch coverage is 83.33333% with 1 line in your changes missing coverage. Please review.

Project coverage is 81.76%. Comparing base (3e55a20) to head (4ed172e).
Report is 36 commits behind head on main.

Files with missing lines	Patch %	Lines
pytensor/link/pytorch/dispatch/scalar.py	83.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1023      +/-   ##
==========================================
+ Coverage   81.74%   81.76%   +0.02%     
==========================================
  Files         183      183              
  Lines       47724    47802      +78     
  Branches    11616    11635      +19     
==========================================
+ Hits        39011    39086      +75     
- Misses       6518     6525       +7     
+ Partials     2195     2191       -4     

Files with missing lines	Coverage Δ
pytensor/link/pytorch/dispatch/scalar.py	73.91% <83.33%> (+3.32%)	⬆️

... and 22 files with indirect coverage changes