Unify all chart files under .obs/charfile

[davidcassany]

This PR removes the charts folder in favor of the .obs/chartfile folder. Now only OBS charts are in place. make charts is still functional on local environments as it essentially takes the OBS files and manually applies required substitutions.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (f1d44d8) 54.13% compared to head (0c5a036) 54.13%.
Report is 1 commits behind head on main.

❗ Current head 0c5a036 differs from pull request most recent head a2a8795. Consider uploading reports for the commit a2a8795 to get more accurate results

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #572   +/-   ##
=======================================
  Coverage   54.13%   54.13%           
=======================================
  Files          39       39           
  Lines        6005     6005           
=======================================
  Hits         3251     3251           
  Misses       2472     2472           
  Partials      282      282           

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[kkaempf]

Cleanup is always good 😆