Feat/implement fusion for irfft

[Sublime12]

Checklist

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

Changes

Add the fusion implementation for irfft

Testing

# activate the tests in cubecl.rs and:
cargo test-wgpu fft

[louisfd]

LGTM

[codecov]

Codecov Report

❌ Patch coverage is 0% with 54 lines in your changes missing coverage. Please review.
✅ Project coverage is 63.33%. Comparing base (c3917da) to head (eaceb04).
⚠️ Report is 6 commits behind head on main.

Files with missing lines	Patch %	Lines
crates/burn-fusion/src/ops/module.rs	0.00%	21 Missing ⚠️
crates/burn-ir/src/operation.rs	0.00%	20 Missing ⚠️
crates/burn-router/src/runner.rs	0.00%	7 Missing ⚠️
crates/burn-fusion/src/stream/context.rs	0.00%	6 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4736      +/-   ##
==========================================
- Coverage   63.37%   63.33%   -0.05%     
==========================================
  Files        1111     1111              
  Lines      146015   146120     +105     
==========================================
+ Hits        92542    92546       +4     
- Misses      53473    53574     +101     

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[laggui]

Just have to resolve the conflicting changes from #4735 which was just merged