transformations: (onnx) lower onnx.Conv to linalg

[kayode-gif]

wip #2395

i used xdsl/tests/filecheck/projects/riscv-backend-paper/bottom_up.mlir to get an idea of how to do it, i feel this is "close"

[superlopuh]

Why not lower to a named op?
https://mlir.llvm.org/docs/Dialects/Linalg/#linalgpooling_nchw_max-linalgpoolingnchwmaxop

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Why not lower to a named op? https://mlir.llvm.org/docs/Dialects/Linalg/#linalgpooling_nchw_max-linalgpoolingnchwmaxop

i guess it was because i dont want to write more interpreter ops, but it may be smoother

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.69%. Comparing base (26d9fe2) to head (a8089e3).
Report is 4 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2396      +/-   ##
==========================================
+ Coverage   89.67%   89.69%   +0.02%     
==========================================
  Files         345      345              
  Lines       41874    41914      +40     
  Branches     6227     6232       +5     
==========================================
+ Hits        37550    37595      +45     
+ Misses       3410     3405       -5     
  Partials      914      914              

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@superlopuh

[superlopuh]

Looking great