Snippet Removal Part 1— TSV generation to download_storages

[ChefAndy]

This part just moves the TSV snippets to regular files. Part 2 with the caching coming up.

[codecov]

Codecov Report

Merging #1932 (0c81cdb) into develop (879c13c) will increase coverage by 0.01%.
The diff coverage is n/a.

@@             Coverage Diff             @@
##           develop    #1932      +/-   ##
===========================================
+ Coverage    59.60%   59.62%   +0.01%     
===========================================
  Files          102      103       +1     
  Lines        10251    10263      +12     
===========================================
+ Hits          6110     6119       +9     
- Misses        4141     4144       +3     

Impacted Files	Coverage Δ
capstone/capstone/scripts/update_snippets.py	86.84% <0.00%> (-4.07%)	⬇️
capstone/capstone/fabfile.py	35.26% <0.00%> (-0.01%)	⬇️
capstone/capstone/scripts/update_download_tsv.py	93.22% <0.00%> (ø)

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[jcushman]

Nice start! I think rather than storing these in the base downloads directory, we should store them with each bulk export. You could update scripts.export.init_export to call scripts.update_download_tsv.update_all at the end, with a path of output_path / 'statistics'. And then the about.md links can go to {% url "download-files" "bulk_exports/latest/statistics/..." %}