Use new get_value API for newly added tests and semantic components

[saikishor]

I missed these in #1976 as these were added in the recent PRs of #2000 and #2011

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 89.44%. Comparing base (9394fd2) to head (1637d59).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2055      +/-   ##
==========================================
+ Coverage   89.34%   89.44%   +0.09%     
==========================================
  Files         139      139              
  Lines       14994    14973      -21     
  Branches     1285     1281       -4     
==========================================
- Hits        13396    13392       -4     
+ Misses       1115     1103      -12     
+ Partials      483      478       -5     

Flag	Coverage Δ
unittests	89.44% <100.00%> (+0.09%)	⬆️

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

Files with missing lines	Coverage Δ
...terface/include/semantic_components/gps_sensor.hpp	100.00% <100.00%> (ø)
hardware_interface/test/test_handle.cpp	100.00% <ø> (ø)

... and 4 files with indirect coverage changes

[christophfroehlich]

LGTM