[CI] test_force_torque_sensor_broadcaster regularily times out (backport #1639)

[mergify]

Per @saikishor's suggestion, this adds debug logs to investigate #1574. We still saw timeout time to time in CI.

---

This is an automatic backport of pull request #1639 done by [Mergify](https://mergify.com).

[christophfroehlich]

@saikishor shall we wait if we see it on rolling/jazzy? or add this on humble as well?

[saikishor]

Yes, we can add to humble later, this wait for rolling/humble now

[codecov]

Codecov Report

Attention: Patch coverage is 20.00000% with 12 lines in your changes missing coverage. Please review.

Project coverage is 67.17%. Comparing base (b265d11) to head (a2b6302).
Report is 6 commits behind head on humble.

Files with missing lines	Patch %	Lines
...roadcaster/src/force_torque_sensor_broadcaster.cpp	0.00%	0 Missing and 7 partials ⚠️
...ster/test/test_force_torque_sensor_broadcaster.cpp	37.50%	0 Missing and 5 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           humble    #1641      +/-   ##
==========================================
- Coverage   67.23%   67.17%   -0.07%     
==========================================
  Files         122      122              
  Lines       14481    14494      +13     
  Branches     8948     8959      +11     
==========================================
- Hits         9737     9736       -1     
- Misses       1459     1461       +2     
- Partials     3285     3297      +12     

Flag	Coverage Δ
unittests	67.17% <20.00%> (-0.07%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Files with missing lines	Coverage Δ
...ster/test/test_force_torque_sensor_broadcaster.cpp	60.67% <37.50%> (-1.32%)	⬇️
...roadcaster/src/force_torque_sensor_broadcaster.cpp	72.60% <0.00%> (-6.51%)	⬇️

... and 1 file with indirect coverage changes

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[christophfroehlich]

we were able to reproduce this on rolling