Get rid of pydot-ng because it's deprecated since 7 years

[maresb]

Description

Get rid of pydot-ng because it's deprecated since 7 years

Checklist

• Checked that the pre-commit linting/style checks pass
• Included tests that prove the fix is effective or that the new feature works
• Added necessary documentation (docstrings and/or example notebooks)
• If you are a pro: each commit corresponds to a relevant logical change

Type of change

• New feature / enhancement
• Bug fix
• Documentation
• Maintenance
• Other (please specify):

---

📚 Documentation preview 📚: https://pytensor--1534.org.readthedocs.build/en/1534/

[codecov]

Codecov Report

Attention: Patch coverage is 42.85714% with 4 lines in your changes missing coverage. Please review.

Project coverage is 81.86%. Comparing base (6770f46) to head (b6c6962).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
pytensor/printing.py	42.85%	4 Missing ⚠️

❌ Your patch status has failed because the patch coverage (42.85%) is below the target coverage (100.00%). You can increase the patch coverage or adjust the target coverage.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1534      +/-   ##
==========================================
+ Coverage   81.85%   81.86%   +0.01%     
==========================================
  Files         230      230              
  Lines       52523    52508      -15     
  Branches     9343     9339       -4     
==========================================
- Hits        42992    42987       -5     
+ Misses       7098     7089       -9     
+ Partials     2433     2432       -1     

Files with missing lines	Coverage Δ
pytensor/printing.py	51.75% <42.85%> (+0.31%)	⬆️

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[ricardoV94]

Thanks Monsieur Bernard