[WIP] Distribution-based dataset creator

[fivosts]

Fixes #{issue number}

[codecov-commenter]

Codecov Report

Merging #748 (71b53ad) into development (48c0ec5) will increase coverage by 0.23%.
The diff coverage is 7.14%.

@@               Coverage Diff               @@
##           development     #748      +/-   ##
===============================================
+ Coverage        88.73%   88.96%   +0.23%     
===============================================
  Files              130      130              
  Lines             7864     7878      +14     
===============================================
+ Hits              6978     7009      +31     
+ Misses             886      869      -17     

Impacted Files	Coverage Δ
compiler_gym/datasets/datasets.py	82.30% <7.14%> (-10.63%)	⬇️
compiler_gym/envs/gcc/service/gcc_service.py	95.60% <0.00%> (-0.37%)	⬇️
compiler_gym/service/connection.py	77.59% <0.00%> (+1.67%)	⬆️
compiler_gym/service/service_cache.py	92.10% <0.00%> (+2.63%)	⬆️
compiler_gym/envs/llvm/datasets/poj104.py	75.67% <0.00%> (+33.78%)	⬆️

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