Move test_components to own package (backport #1325)

[mergify]

This is an automatic backport of pull request #1325 done by Mergify.
Cherry-pick of 0bdcd41 has failed:

On branch mergify/bp/humble/pr-1325
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Changes to be committed:
	modified:   .github/workflows/ci-ros-lint.yml
	new file:   hardware_interface_testing/CMakeLists.txt
	new file:   hardware_interface_testing/README.md
	new file:   hardware_interface_testing/package.xml
	renamed:    hardware_interface/test/test_components/test_actuator.cpp -> hardware_interface_testing/test/test_components/test_actuator.cpp
	renamed:    hardware_interface/test/test_components/test_components.xml -> hardware_interface_testing/test/test_components/test_components.xml
	renamed:    hardware_interface/test/test_components/test_sensor.cpp -> hardware_interface_testing/test/test_components/test_sensor.cpp
	renamed:    hardware_interface/test/test_components/test_system.cpp -> hardware_interface_testing/test/test_components/test_system.cpp
	renamed:    hardware_interface/test/test_resource_manager.cpp -> hardware_interface_testing/test/test_resource_manager.cpp
	renamed:    hardware_interface/test/test_resource_manager.hpp -> hardware_interface_testing/test/test_resource_manager.hpp
	renamed:    hardware_interface/test/test_resource_manager_prepare_perform_switch.cpp -> hardware_interface_testing/test/test_resource_manager_prepare_perform_switch.cpp

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   .github/workflows/ci-coverage-build.yml
	both modified:   controller_manager/package.xml
	both modified:   hardware_interface/CMakeLists.txt

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[codecov]

Codecov Report

Attention: 26 lines in your changes are missing coverage. Please review.

Comparison is base (dc7b7be) 31.14% compared to head (3bb868a) 31.03%.

Additional details and impacted files

@@            Coverage Diff             @@
##           humble    #1340      +/-   ##
==========================================
- Coverage   31.14%   31.03%   -0.11%     
==========================================
  Files          95       95              
  Lines       10731    10729       -2     
  Branches     7421     7421              
==========================================
- Hits         3342     3330      -12     
- Misses        715      723       +8     
- Partials     6674     6676       +2     

Flag	Coverage Δ
unittests	31.03% <18.75%> (-0.11%)	⬇️

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

Files	Coverage Δ
...ace_testing/test/test_components/test_actuator.cpp	68.88% <ø> (ø)
...rface_testing/test/test_components/test_sensor.cpp	73.68% <ø> (ø)
...rface_testing/test/test_components/test_system.cpp	61.36% <ø> (ø)
...e_interface_testing/test/test_resource_manager.hpp	72.22% <ø> (ø)
...t/test_resource_manager_prepare_perform_switch.cpp	7.76% <ø> (ø)
...e_interface_testing/test/test_resource_manager.cpp	28.52% <18.75%> (ø)

... and 5 files with indirect coverage changes