[Spawner] Accept parsing multiple --param-file arguments to spawner (backport #1805)

[mergify]

When we use multiple controlers to activate or deactivate, it is quite cumbersome to accept only one --param-file arg as it is not very scalable. For this reason, now the spawner can accept multiple --param-file args and set the respective param_file to those corresponding controllers.

Along with the above mentioned change, now the controllers can accept multiple param-file args as well, and this is very helpful to be able to override parameters between parameter files as how it is done with the standard ROS 2 nodes

---

This is an automatic backport of pull request #1805 done by Mergify.

[mergify]

Cherry-pick of 73fe227 has failed:

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Changes to be committed:
	modified:   controller_manager/controller_manager/__init__.py
	modified:   controller_manager/doc/userdoc.rst
	modified:   hardware_interface/include/hardware_interface/controller_info.hpp

Unmerged paths:
  (use "git add <file>..." to mark resolution)
	both modified:   controller_manager/controller_manager/controller_manager_services.py
	both modified:   controller_manager/controller_manager/launch_utils.py
	both modified:   controller_manager/controller_manager/spawner.py
	both modified:   controller_manager/src/controller_manager.cpp
	both modified:   controller_manager/test/test_spawner_unspawner.cpp
	both modified:   doc/release_notes.rst
	both modified:   ros2controlcli/ros2controlcli/verb/load_controller.py

To fix up this pull request, you can check it out locally. See documentation: https://docs.github.com/en/pull-requests/collaborating-with-pull-requests/reviewing-changes-in-pull-requests/checking-out-pull-requests-locally

[christophfroehlich]

will need
#1898
#1899

[christophfroehlich]

Thanks for fixing this!

[codecov]

Codecov Report

Attention: Patch coverage is 52.53456% with 103 lines in your changes missing coverage. Please review.

Project coverage is 63.00%. Comparing base (5a3433c) to head (bbee523).
Report is 1 commits behind head on humble.

Files with missing lines	Patch %	Lines
controller_manager/test/test_spawner_unspawner.cpp	49.20%	2 Missing and 62 partials ⚠️
...troller_manager/controller_manager/launch_utils.py	0.00%	19 Missing ⚠️
.../controller_manager/controller_manager_services.py	79.59%	5 Missing and 5 partials ⚠️
controller_manager/src/controller_manager.cpp	56.25%	4 Missing and 3 partials ⚠️
controller_manager/controller_manager/spawner.py	57.14%	1 Missing and 2 partials ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           humble    #1894      +/-   ##
==========================================
- Coverage   63.18%   63.00%   -0.19%     
==========================================
  Files         109      109              
  Lines       12290    12448     +158     
  Branches     8314     8444     +130     
==========================================
+ Hits         7766     7843      +77     
- Misses        820      841      +21     
- Partials     3704     3764      +60     

Flag	Coverage Δ
unittests	63.00% <52.53%> (-0.19%)	⬇️

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

Files with missing lines	Coverage Δ
controller_manager/controller_manager/__init__.py	100.00% <ø> (ø)
controller_manager/controller_manager/spawner.py	69.40% <57.14%> (+0.46%)	⬆️
controller_manager/src/controller_manager.cpp	67.05% <56.25%> (-0.03%)	⬇️
.../controller_manager/controller_manager_services.py	80.95% <79.59%> (-1.08%)	⬇️
...troller_manager/controller_manager/launch_utils.py	0.00% <0.00%> (ø)
controller_manager/test/test_spawner_unspawner.cpp	53.88% <49.20%> (-1.05%)	⬇️