Publish all castable data types to pal_statistics

[christophfroehlich]

Handle types not being double are just not published now.

I tried to make cast_to_double() reusable, I did not find a better place to add it.

[destogl]

I find this good! We will also need this for reuse of controllers.

Also do backwards casting from double to internal values.

[destogl]

I find this good!

[codecov]

Codecov Report

❌ Patch coverage is 90.00000% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.49%. Comparing base (30416ba) to head (af50a40).
⚠️ Report is 4 commits behind head on master.

Files with missing lines	Patch %	Lines
...re_interface/include/hardware_interface/handle.hpp	71.42%	2 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #2633      +/-   ##
==========================================
- Coverage   89.62%   89.49%   -0.14%     
==========================================
  Files         152      152              
  Lines       17817    18021     +204     
  Branches     1455     1468      +13     
==========================================
+ Hits        15968    16127     +159     
- Misses       1263     1306      +43     
- Partials      586      588       +2     

Flag	Coverage Δ
unittests	89.49% <90.00%> (-0.14%)	⬇️

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

Files with missing lines	Coverage Δ
...rface/include/hardware_interface/hardware_info.hpp	92.85% <100.00%> (+12.08%)	⬆️
hardware_interface/test/test_handle.cpp	98.68% <100.00%> (+0.16%)	⬆️
...ace_testing/test/test_components/test_actuator.cpp	88.73% <100.00%> (ø)
...re_interface/include/hardware_interface/handle.hpp	85.92% <71.42%> (-0.14%)	⬇️

... and 1 file with indirect coverage changes

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[saikishor]

@christophfroehlich don't we want to backport this to Jazzy?