add specializations for some triangular-triangular multiplications

[Red-Portal]

This implements a few of the triangular-triangular multiplications by invoking trmm!, which addresses #1486

[codecov]

Codecov Report

Merging #1538 (9a40a20) into master (29afec2) will decrease coverage by 0.59%.
The diff coverage is 100.00%.

❗ Current head 9a40a20 differs from pull request most recent head c9e6b3d. Consider uploading reports for the commit c9e6b3d to get more accurate results

@@            Coverage Diff             @@
##           master    #1538      +/-   ##
==========================================
- Coverage   73.64%   73.05%   -0.60%     
==========================================
  Files         131      131              
  Lines        9859     9882      +23     
==========================================
- Hits         7261     7219      -42     
- Misses       2598     2663      +65     

Impacted Files	Coverage Δ
lib/cublas/linalg.jl	83.03% <100.00%> (+2.03%)	⬆️
lib/cudnn/CUDNN.jl	37.50% <0.00%> (-35.94%)	⬇️
lib/cublas/CUBLAS.jl	50.44% <0.00%> (-25.67%)	⬇️
src/utilities.jl	68.91% <0.00%> (-4.06%)	⬇️
lib/cudadrv/CUDAdrv.jl	81.66% <0.00%> (-3.34%)	⬇️
lib/cudadrv/module/linker.jl	68.75% <0.00%> (-3.13%)	⬇️
lib/cudadrv/state.jl	77.84% <0.00%> (-2.28%)	⬇️
lib/cudadrv/error.jl	88.57% <0.00%> (-2.06%)	⬇️
lib/cudadrv/memory.jl	78.59% <0.00%> (-1.01%)	⬇️
lib/cusolver/linalg.jl	87.42% <0.00%> (+0.91%)	⬆️

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[Red-Portal]

Great! Thanks for the quick review.