Migrate setup.py from distutils to setuptools

[geojacobm6]

Fixes #3272

Migrate setup.py from distutils to setuptools

distutils is going away in a future version of Python

https://docs.python.org/3/whatsnew/3.10.html#distutils-deprecated

[codecov]

Codecov Report

Merging #3274 (701cb45) into develop (a9fc7fc) will decrease coverage by 0.11%.
The diff coverage is n/a.

❗ Current head 701cb45 differs from pull request most recent head be503bd. Consider uploading reports for the commit be503bd to get more accurate results

@@             Coverage Diff             @@
##           develop    #3274      +/-   ##
===========================================
- Coverage    79.03%   78.91%   -0.12%     
===========================================
  Files           68       68              
  Lines        11781    11781              
===========================================
- Hits          9311     9297      -14     
- Misses        2470     2484      +14     

Impacted Files	Coverage Δ
gensim/corpora/dictionary.py	94.17% <ø> (ø)
gensim/corpora/wikicorpus.py	82.21% <0.00%> (-5.29%)	⬇️
gensim/utils.py	71.05% <0.00%> (-0.49%)	⬇️

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[mpenkov]

Good work, thank you!