Fix the duplicate entries in the controller exported interfaces (backport #2951)

[mergify]

This introduces the fix for the case when the make_controller_exported_state_interfaces_available is called multiple times by the controller manager. This became an issue after merging #2902. We will add tests to this part sooner.

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This is an automatic backport of pull request #2951 done by Mergify.

[codecov]

Codecov Report

❌ Patch coverage is 91.83673% with 4 lines in your changes missing coverage. Please review.
✅ Project coverage is 89.33%. Comparing base (9fde1e3) to head (9a625c4).
⚠️ Report is 1 commits behind head on jazzy.

Files with missing lines	Patch %	Lines
controller_manager/src/controller_manager.cpp	85.71%	0 Missing and 2 partials ⚠️
...t_controllers_chaining_with_controller_manager.cpp	93.54%	2 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##            jazzy    #2954      +/-   ##
==========================================
- Coverage   89.33%   89.33%   -0.01%     
==========================================
  Files         157      157              
  Lines       18630    18664      +34     
  Branches     1490     1492       +2     
==========================================
+ Hits        16644    16674      +30     
- Misses       1383     1385       +2     
- Partials      603      605       +2     

Flag	Coverage Δ
unittests	89.33% <91.83%> (-0.01%)	⬇️

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Files with missing lines	Coverage Δ
hardware_interface/src/resource_manager.cpp	74.12% <100.00%> (-0.19%)	⬇️
controller_manager/src/controller_manager.cpp	77.19% <85.71%> (+0.02%)	⬆️
...t_controllers_chaining_with_controller_manager.cpp	99.00% <93.54%> (-0.26%)	⬇️

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