Remove unnecessary publish_limited_velocity_ member (backport #2266)

[mergify]

Summary

• Removed the redundant publish_limited_velocity_ member from the DiffDriveController.

Changes

• Removed publish_limited_velocity_ from the header file.
• Replaced uses of publish_limited_velocity_ with params_.publish_limited_velocity in the implementation.

Closes #2246

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This is an automatic backport of pull request #2266 done by Mergify.

[codecov]

Codecov Report

❌ Patch coverage is 0% with 1 line in your changes missing coverage. Please review.
✅ Project coverage is 85.30%. Comparing base (044f98a) to head (42776b8).
⚠️ Report is 8 commits behind head on kilted.

Files with missing lines	Patch %	Lines
...iff_drive_controller/src/diff_drive_controller.cpp	0.00%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           kilted    #2269      +/-   ##
==========================================
- Coverage   85.32%   85.30%   -0.02%     
==========================================
  Files         151      151              
  Lines       14831    14832       +1     
  Branches     1281     1282       +1     
==========================================
- Hits        12654    12653       -1     
- Misses       1723     1725       +2     
  Partials      454      454              

Flag	Coverage Δ
unittests	85.30% <0.00%> (-0.02%)	⬇️

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

Files with missing lines	Coverage Δ
...iff_drive_controller/src/diff_drive_controller.cpp	82.62% <0.00%> (-0.06%)	⬇️

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