fix: align baggage.remove() implementation

[gruebel]

Relates to #2717 point 6

Changes

• also added a simple CRUD test to make sure, all the operations work as intended (also the conflict override)

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)
• Appropriate CHANGELOG.md files updated for non-trivial, user-facing changes
• Changes in public API reviewed (if applicable)

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 79.4%. Comparing base (46a7cd6) to head (b1a96da).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #2734   +/-   ##
=====================================
  Coverage   79.4%   79.4%           
=====================================
  Files        123     123           
  Lines      22770   22781   +11     
=====================================
+ Hits       18088   18106   +18     
+ Misses      4682    4675    -7     

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[cijothomas]

Thanks!
(Merged other PR so need to resolve conflict before merge.)