Handle MvNormal method in Op call

[ricardoV94]

So it's easier to integrate from PyMC and matches numpy API when using RandomStream

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📚 Documentation preview 📚: https://pytensor--1252.org.readthedocs.build/en/1252/

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 81.98%. Comparing base (7f03125) to head (4e9d687).
Report is 147 commits behind head on main.

Additional details and impacted files

@@           Coverage Diff           @@
##             main    #1252   +/-   ##
=======================================
  Coverage   81.98%   81.98%           
=======================================
  Files         188      188           
  Lines       48537    48542    +5     
  Branches     8674     8675    +1     
=======================================
+ Hits        39794    39799    +5     
  Misses       6581     6581           
  Partials     2162     2162           

Files with missing lines	Coverage Δ
pytensor/tensor/random/basic.py	98.85% <100.00%> (+0.01%)	⬆️

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