Add set and add TensorVariable methods for set_subtensor and inc_subtensor operations` (discarded API)

[ricardoV94]

Uses a similar syntax as JAX, which is considerably less verbose.

import pytensor.tensor as pt

x = pt.matrix()
y = x[0].set(5)  # Equivalent to `y = pt.set_subtensor(x[0], 5)`
y = x[0].add(5)  # Equivalent to `y = pt.inc_subtensor(x[0], 5)`

[junpenglao]

Nice

[codecov-commenter]

Codecov Report

Merging #493 (859b59f) into main (0f802ab) will increase coverage by 0.00%.
Report is 1 commits behind head on main.
The diff coverage is 100.00%.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #493   +/-   ##
=======================================
  Coverage   80.76%   80.77%           
=======================================
  Files         161      161           
  Lines       46080    46084    +4     
  Branches    11258    11258           
=======================================
+ Hits        37218    37224    +6     
+ Misses       6635     6634    -1     
+ Partials     2227     2226    -1     

Files	Coverage Δ
pytensor/tensor/variable.py	87.71% <100.00%> (+0.09%)	⬆️

... and 1 file with indirect coverage changes