Cube: Matmul tiling

[louisfd]

Matmul tiling again. Has undergone major refactoring and performance enhancing since my last draft.

[codecov]

Codecov Report

Attention: Patch coverage is 52.40729% with 1463 lines in your changes missing coverage. Please review.

Project coverage is 84.49%. Comparing base (c2b6318) to head (74b5d5b).

Files	Patch %	Lines
.../kernel/matmul/tiling2d_cube/load_shared_memory.rs	54.67%	291 Missing ⚠️
.../kernel/matmul/tiling2d_cube/tile/memory_access.rs	10.19%	185 Missing ⚠️
...jit/src/kernel/matmul/tiling2d_cube/tile/loader.rs	7.64%	157 Missing ⚠️
...l/tiling2d_cube/tile/block_io/whole_block_check.rs	4.46%	107 Missing ⚠️
...s/burn-jit/src/kernel/matmul/tiling2d_cube/base.rs	14.15%	97 Missing ⚠️
...iling2d_cube/tile/block_io/vertical_block_check.rs	6.66%	84 Missing ⚠️
...ing2d_cube/tile/block_io/horizontal_block_check.rs	7.86%	82 Missing ⚠️
...it/src/kernel/matmul/tiling2d_cube/write_output.rs	67.66%	65 Missing ⚠️
...mul/tiling2d_cube/tile/block_io/unchecked_block.rs	12.12%	58 Missing ⚠️
...-jit/src/kernel/matmul/tiling2d_cube/block_loop.rs	12.69%	55 Missing ⚠️
... and 20 more

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #1994      +/-   ##
==========================================
- Coverage   85.38%   84.49%   -0.90%     
==========================================
  Files         821      840      +19     
  Lines      101427   104339    +2912     
==========================================
+ Hits        86603    88157    +1554     
- Misses      14824    16182    +1358     

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