[CI]: Adapt usage of junifer-data for Docker images

[synchon]

• description of feature/fix
• tests added/passed
• add an entry for the latest changes

This PR removes xfms and adds junifer-data for CI images.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 85.73%. Comparing base (145b2d0) to head (af1ae37).
Report is 4 commits behind head on main.

❌ Your project status has failed because the head coverage (85.72%) is below the target coverage (90.00%). You can increase the head coverage or adjust the target coverage.

Additional details and impacted files

@@           Coverage Diff           @@
##             main     #427   +/-   ##
=======================================
  Coverage   85.73%   85.73%           
=======================================
  Files         133      133           
  Lines        5656     5656           
  Branches      958      958           
=======================================
  Hits         4849     4849           
  Misses        618      618           
  Partials      189      189           

Flag	Coverage Δ
docs	100.00% <ø> (ø)

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