Sensor: add sdf::Errors output to API methods

[marcoag]

Signed-off-by: Marco A. Gutierrez marco@openrobotics.org

🎉 New feature

Work towards #820.

Summary

Makes errors to be reported through sdf::Errors when using the ToElement(sdf::Errors &_errors) method of the Sensor class.

Test it

Using the ToElement(sdf::Errors &_errors) method of the Sensor class should report all errors through sdf::Errors.

Checklist

• Signed all commits for DCO
• Added tests
• Added example and/or tutorial
• Updated documentation (as needed)
• Updated migration guide (as needed)
• Consider updating Python bindings (if the library has them)
• codecheck passed (See contributing)
• All tests passed (See test coverage)
• While waiting for a review on your PR, please help review another open pull request to support the maintainers

Note to maintainers: Remember to use Squash-Merge and edit the commit message to match the pull request summary while retaining Signed-off-by messages.

[codecov]

Codecov Report

Merging #1138 (135da9e) into sdf13 (74b5785) will decrease coverage by 0.00%.
The diff coverage is 91.66%.

@@            Coverage Diff             @@
##            sdf13    #1138      +/-   ##
==========================================
- Coverage   87.20%   87.20%   -0.01%     
==========================================
  Files         124      124              
  Lines       16222    16229       +7     
==========================================
+ Hits        14146    14152       +6     
- Misses       2076     2077       +1     

Impacted Files	Coverage Δ
src/Sensor.cc	92.92% <91.66%> (-0.16%)	⬇️

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