Fix and pin OTEL collector chart and image

[andracc]

This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 72.83%. Comparing base (c3dd452) to head (012e899).
Report is 51 commits behind head on master.

Additional details and impacted files

@@           Coverage Diff           @@
##           master    #3788   +/-   ##
=======================================
  Coverage   72.83%   72.83%           
=======================================
  Files         287      287           
  Lines       10701    10701           
  Branches     1330     1330           
=======================================
  Hits         7794     7794           
  Misses       2512     2512           
  Partials      395      395           

Flag	Coverage Δ
backend	81.83% <ø> (ø)
frontend	65.78% <ø> (ø)

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[imnasnainaec]

Reviewed 2 of 2 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @andracc)