Use input shapes to compute output shape in Elemwise.infer_shape

[brandonwillard]

Closes #979

[codecov]

Codecov Report

Merging #981 (3c7591b) into main (8559ae4) will increase coverage by 0.01%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##             main     #981      +/-   ##
==========================================
+ Coverage   79.25%   79.26%   +0.01%     
==========================================
  Files         152      152              
  Lines       47941    47927      -14     
  Branches    10916    10912       -4     
==========================================
- Hits        37996    37990       -6     
+ Misses       7432     7429       -3     
+ Partials     2513     2508       -5     

Impacted Files	Coverage Δ
aesara/tensor/elemwise.py	88.50% <100.00%> (+0.33%)	⬆️
aesara/tensor/extra_ops.py	88.93% <100.00%> (-0.02%)	⬇️
aesara/tensor/basic.py	90.78% <0.00%> (+0.12%)	⬆️
aesara/tensor/subtensor_opt.py	86.32% <0.00%> (+0.26%)	⬆️