More nit fixes to opentelemetry benches

[cijothomas]

Fixes #
Design discussion issue (if applicable) #

Changes

Please provide a brief description of the changes here.

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 67.3%. Comparing base (a80dedf) to head (aabad85).

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #1617   +/-   ##
=====================================
  Coverage   67.3%   67.3%           
=====================================
  Files        138     138           
  Lines      19654   19654           
=====================================
  Hits       13243   13243           
  Misses      6411    6411           

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