[chore] Cleanup internal names for RequestErrorHandler since moved to request package

[bogdandrutu]

… request package

Description

Link to tracking issue

Fixes #

Testing

Documentation

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 92.16%. Comparing base (7d3e03e) to head (ffe315a).
Report is 8 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main   #12614      +/-   ##
==========================================
- Coverage   92.18%   92.16%   -0.02%     
==========================================
  Files         469      471       +2     
  Lines       25394    25561     +167     
==========================================
+ Hits        23409    23558     +149     
- Misses       1574     1591      +17     
- Partials      411      412       +1     

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