Fix and test leakyrelu

[chriselrod]

No description provided.

[codecov]

Codecov Report

Patch coverage: 57.89% and project coverage change: +0.03 🎉

Comparison is base (a21d6f8) 85.79% compared to head (b7c6c02) 85.83%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #505      +/-   ##
==========================================
+ Coverage   85.79%   85.83%   +0.03%     
==========================================
  Files          39       39              
  Lines        9575     9584       +9     
==========================================
+ Hits         8215     8226      +11     
+ Misses       1360     1358       -2     

Impacted Files	Coverage Δ
src/LoopVectorization.jl	100.00% <ø> (ø)
src/predicates.jl	100.00% <ø> (ø)
ext/ForwardDiffExt.jl	5.64% <33.33%> (+5.64%)	⬆️
src/codegen/split_loops.jl	100.00% <100.00%> (ø)
src/modeling/costs.jl	60.00% <100.00%> (ø)
src/reconstruct_loopset.jl	92.32% <100.00%> (ø)
src/simdfunctionals/mapreduce.jl	92.63% <100.00%> (ø)

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