fix integration test

[lalitb]

Changes

Got broken with #2221 onwards - https://github.com/open-telemetry/opentelemetry-rust/actions/runs/11709784276/job/32614582003

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 79.5%. Comparing base (500d913) to head (bdbc644).
Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #2278   +/-   ##
=====================================
  Coverage   79.5%   79.5%           
=====================================
  Files        121     121           
  Lines      20974   20974           
=====================================
  Hits       16686   16686           
  Misses      4288    4288           

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