Make get_data_in_units work with channel_conversion

[h-mayorquin]

Motivation

Fix #1797

How to test the behavior?

Added test

Checklist

• Did you update CHANGELOG.md with your changes?
• Have you checked our Contributing document?
• Have you ensured the PR clearly describes the problem and the solution?
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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (ac17d17) 91.98% compared to head (a90c213) 91.99%.

Additional details and impacted files

@@           Coverage Diff           @@
##              dev    #1806   +/-   ##
=======================================
  Coverage   91.98%   91.99%           
=======================================
  Files          27       27           
  Lines        2620     2623    +3     
  Branches      684      685    +1     
=======================================
+ Hits         2410     2413    +3     
  Misses        138      138           
  Partials       72       72           

Flag	Coverage Δ
integration	71.10% <0.00%> (-0.09%)	⬇️
unit	83.68% <100.00%> (+0.01%)	⬆️

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[rly]

Looks good. Thanks for the PR @h-mayorquin !