Add resources_lock_ lock_guards to avoid race condition when loading robot_description through topic (backport #1451)

[mergify]

As reported in #1442, loading the robot_description through the topic will cause a segmentation fault or some undefined behaviors as the read and write methods real-time methods are continuously executed, and when the robot description is received and the resource_manager is to be initialized, there is no lock_guard of recursive mutex resources_lock_, which should avoid the RM to execute the components when they are changing state or being loaded and initialized

Fixes #1442

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This is an automatic backport of pull request #1451 done by Mergify.

[mergify]

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	both modified:   hardware_interface/src/resource_manager.cpp

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[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 87.00%. Comparing base (c04a16f) to head (7fbec9c).
Report is 4 commits behind head on humble.

Additional details and impacted files

@@            Coverage Diff             @@
##           humble    #1599      +/-   ##
==========================================
- Coverage   87.00%   87.00%   -0.01%     
==========================================
  Files          97       97              
  Lines        7505     7508       +3     
  Branches      677      677              
==========================================
+ Hits         6530     6532       +2     
- Misses        688      689       +1     
  Partials      287      287              

Flag	Coverage Δ
unittests	87.00% <100.00%> (-0.01%)	⬇️

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Files	Coverage Δ
hardware_interface/src/resource_manager.cpp	80.27% <100.00%> (+0.06%)	⬆️

... and 1 file with indirect coverage changes