Implement numba dispatch of StudentT

[ricardoV94]

Closes pymc-devs/pymc#7778

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📚 Documentation preview 📚: https://pytensor--1402.org.readthedocs.build/en/1402/

[jessegrabowski]

well, that was easy

[codecov]

Codecov Report

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

Project coverage is 82.08%. Comparing base (7b0a392) to head (7447064).
Report is 1 commits behind head on main.

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

❌ Your patch status has failed because the patch coverage (83.33%) 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    #1402   +/-   ##
=======================================
  Coverage   82.08%   82.08%           
=======================================
  Files         208      208           
  Lines       49559    49565    +6     
  Branches     8792     8792           
=======================================
+ Hits        40680    40685    +5     
- Misses       6705     6706    +1     
  Partials     2174     2174           

Files with missing lines	Coverage Δ
pytensor/link/numba/dispatch/random.py	56.41% <83.33%> (+0.60%)	⬆️

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