Add CUDA 11.2 artifacts.

[maleadt]

Not enabled by default, since we don't have CUDNN or CUTENSOR for CUDA 11.2 yet.

[codecov]

Codecov Report

Merging #624 (a1c8953) into master (c011ffc) will decrease coverage by 0.13%.
The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master     #624      +/-   ##
==========================================
- Coverage   79.95%   79.82%   -0.14%     
==========================================
  Files         116      116              
  Lines        6856     6869      +13     
==========================================
+ Hits         5482     5483       +1     
- Misses       1374     1386      +12     

Impacted Files	Coverage Δ
lib/cublas/wrappers.jl	91.91% <100.00%> (+0.01%)	⬆️
lib/cudnn/activation.jl	93.75% <0.00%> (-6.25%)	⬇️
lib/cudnn/filter.jl	58.33% <0.00%> (-5.31%)	⬇️
lib/cudnn/nnlib.jl	69.42% <0.00%> (-1.77%)	⬇️
lib/cudnn/conv.jl	47.69% <0.00%> (-1.52%)	⬇️
lib/cudnn/tensor.jl	57.14% <0.00%> (-1.20%)	⬇️
lib/cudnn/batchnorm.jl	35.29% <0.00%> (-0.71%)	⬇️

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