Add cast to boolean for cm_topic component

[christophfroehlich]

Bags recorded with ros-controls/ros2_control#2633 will fail now due to bad variant access.

Needs: ros-controls/ros2_control#2831

[christophfroehlich]

I changed it to switch locally as pre request of @saikishor. An alternative to doing this in the framework ros-controls/ros2_control#2857
Disadvantage: we have to update this component every time we update the variants.

[codecov-commenter]

Codecov Report

❌ Patch coverage is 80.00000% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 78.46%. Comparing base (a151ab3) to head (4d0db1e).
⚠️ Report is 3 commits behind head on main.

Files with missing lines	Patch %	Lines
...ware_component/src/cm_topic_hardware_component.cpp	75.00%	3 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #64      +/-   ##
==========================================
+ Coverage   78.23%   78.46%   +0.23%     
==========================================
  Files           6        6              
  Lines         441      455      +14     
  Branches       45       45              
==========================================
+ Hits          345      357      +12     
- Misses         66       69       +3     
+ Partials       30       29       -1     

Flag	Coverage Δ
unittests	78.46% <80.00%> (+0.23%)	⬆️

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

Files with missing lines	Coverage Δ
...omponent/test/cm_topic_hardware_component_test.cpp	87.77% <100.00%> (+0.42%)	⬆️
...ware_component/src/cm_topic_hardware_component.cpp	78.04% <75.00%> (-1.96%)	⬇️

... and 1 file with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[saikishor]

LGTM

[MarqRazz]

Changes look good. Maybe have a debug log for unsupported datatypes that way it's a little easier for people to see whats wrong without having to dig through the source code.