Fix data_logger timer

[BenediktBurger]

Fixes bugs:

• If you set the trigger to the timer and a timeout, the timer is started before the timeout value is updated, therefore the timer uses the previous timeout value.
• There was no lock around the lists, therefore, while saving a file, the timed trigger (executed in another thread) could add elements to list, enlarging some of the lists, but not all.

This PR modifies the tests to show this scenario (first issue) and fixes the problem.

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.58%. Comparing base (0ce18cf) to head (5238d1c).

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #70      +/-   ##
==========================================
- Coverage   87.60%   87.58%   -0.03%     
==========================================
  Files          36       36              
  Lines        2888     2899      +11     
  Branches      348      355       +7     
==========================================
+ Hits         2530     2539       +9     
- Misses        298      300       +2     
  Partials       60       60              

Flag	Coverage Δ
unittests	87.58% <100.00%> (-0.03%)	⬇️

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

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.