Upgrading master branch to Django 3.2 LTS

[deniszh]

• removing Python 2.7, keeping only actual versions
• removing pyparsing2
• removing scandir from deps
• removing some deprecations
• fix Deepsource issues

[deniszh]

Prolly I need fork master again, current version looks weird

[codecov-commenter]

Codecov Report

Merging #2763 (ad25df1) into master (b52987a) will increase coverage by 0.02%. The diff coverage is 100.00%.

@@            Coverage Diff             @@
##           master    #2763      +/-   ##
==========================================
+ Coverage   76.30%   76.32%   +0.02%     
==========================================
  Files          88       88              
  Lines        9622     9622              
  Branches     2154     2154              
==========================================
+ Hits         7342     7344       +2     
+ Misses       2014     2013       -1     
+ Partials      266      265       -1     

Impacted Files	Coverage Δ
webapp/graphite/render/glyph.py	41.19% <100.00%> (ø)
webapp/graphite/tags/redis.py	88.27% <0.00%> (+1.23%)	:arrow_up:

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[stale[bot]]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[deniszh]

closed in the favor of https://github.com/graphite-project/graphite-web/pull/2766