Add crappy rule for dA in Sparse matmul

[ptiede]

In progress

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Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 71.56%. Comparing base (037dfed) to head (75968aa).
Report is 236 commits behind head on main.

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Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2109      +/-   ##
==========================================
+ Coverage   67.50%   71.56%   +4.05%     
==========================================
  Files          31       11      -20     
  Lines       12668      640   -12028     
==========================================
- Hits         8552      458    -8094     
+ Misses       4116      182    -3934     

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