[CM] Handle other exceptions while loading the controller plugin (backport #1731)

[mergify]

As of now, we are only handling the exceptions of the pluginlib::CreateClassException there are many other exceptions defined by the pluginlib, that might be also interesting to catch. I'm using std::exception as the main PluginlibException is derived from std::runtime_error and which is derived from std::exception, and this gives us way to be generic (https://github.com/ros/pluginlib/blob/jazzy/pluginlib/include/pluginlib/exceptions.hpp#L43)

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This is an automatic backport of pull request #1731 done by Mergify.

[codecov]

Codecov Report

Attention: Patch coverage is 0% with 4 lines in your changes missing coverage. Please review.

Project coverage is 62.13%. Comparing base (19d81e6) to head (39b1cea).
Report is 2 commits behind head on iron.

Files with missing lines	Patch %	Lines
controller_manager/src/controller_manager.cpp	0.00%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##             iron    #1734      +/-   ##
==========================================
- Coverage   62.17%   62.13%   -0.04%     
==========================================
  Files         109      109              
  Lines       12218    12221       +3     
  Branches     8549     8547       -2     
==========================================
- Hits         7596     7594       -2     
- Misses        874      879       +5     
  Partials     3748     3748              

Flag	Coverage Δ
unittests	62.13% <0.00%> (-0.04%)	⬇️

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Files with missing lines	Coverage Δ
controller_manager/src/controller_manager.cpp	69.69% <0.00%> (-0.36%)	⬇️