Debug gpu

[jeremiedb]

• fix performance regression from @sync in CUDA v5
• fix unexported sigmoid funcion for logistic eval in CUDA extension

[codecov]

Codecov Report

Attention: 9 lines in your changes are missing coverage. Please review.

Comparison is base (4458a63) 51.08% compared to head (c7fe1f0) 51.00%.

Additional details and impacted files

@@            Coverage Diff             @@
##             main     #261      +/-   ##
==========================================
- Coverage   51.08%   51.00%   -0.08%     
==========================================
  Files          22       22              
  Lines        1985     1984       -1     
==========================================
- Hits         1014     1012       -2     
- Misses        971      972       +1     

Files	Coverage Δ
ext/EvoTreesCUDAExt/eval.jl	0.00% <0.00%> (ø)
ext/EvoTreesCUDAExt/fit.jl	0.00% <0.00%> (ø)
ext/EvoTreesCUDAExt/init.jl	0.00% <0.00%> (ø)
ext/EvoTreesCUDAExt/fit-utils.jl	0.00% <0.00%> (ø)

... and 2 files with indirect coverage changes

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