Migrate to type magic autotune

[wingertge]

Pull Request Template

Checklist

• Confirmed that run-checks all script has been executed.
• Made sure the book is up to date with changes in this PR.

Related Issues/PRs

Migrates to changes made in tracel-ai/cubecl#430

Changes

Removes tune macro uses and migrates to new API.

Testing

All tests passing

[codecov]

Codecov Report

Attention: Patch coverage is 84.32836% with 21 lines in your changes missing coverage. Please review.

Project coverage is 83.60%. Comparing base (6750fd6) to head (49e2810).
Report is 2 commits behind head on main.

Files with missing lines	Patch %	Lines
...s/burn-jit/src/kernel/conv/conv2d/implicit_gemm.rs	45.94%	20 Missing ⚠️
crates/burn-jit/src/kernel/conv/error.rs	90.90%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #2710      +/-   ##
==========================================
+ Coverage   83.36%   83.60%   +0.24%     
==========================================
  Files         819      819              
  Lines      106661   106600      -61     
==========================================
+ Hits        88916    89124     +208     
+ Misses      17745    17476     -269     

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