[JTC] Remove read_only from 'joints', 'state_interfaces' and 'command… (backport #967)

[mergify]

This is an automatic backport of pull request #967 done by Mergify.

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Comparison is base (8fd5e83) 45.48% compared to head (c967855) 46.10%.

Additional details and impacted files

@@            Coverage Diff             @@
##           humble     #968      +/-   ##
==========================================
+ Coverage   45.48%   46.10%   +0.61%     
==========================================
  Files          40       40              
  Lines        3713     3713              
  Branches     1769     1769              
==========================================
+ Hits         1689     1712      +23     
+ Misses        803      779      -24     
- Partials     1221     1222       +1     

Flag	Coverage Δ
unittests	46.10% <ø> (+0.61%)	⬆️

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see 2 files with indirect coverage changes