fix: retry_classification tests

[svencowart]

Small fix to allow cargo test --all to execute without immediately erroring.

Changes

• Add #[cfg(feature = "experimental-http-retry")] gate to http_tests module
• Replace wildcard imports with explicit imports in test modules
• Remove unused imports from parent tests module
• Move Duration import into http_tests submodule scope

Merge requirement checklist

• CONTRIBUTING guidelines followed
• Unit tests added/updated (if applicable)

[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 80.8%. Comparing base (d721037) to head (ed0c838).
⚠️ Report is 1 commits behind head on main.

Additional details and impacted files

@@          Coverage Diff          @@
##            main   #3212   +/-   ##
=====================================
  Coverage   80.8%   80.8%           
=====================================
  Files        128     128           
  Lines      23090   23090           
=====================================
  Hits       18676   18676           
  Misses      4414    4414           

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.

[scottgerring]

Hey @svencowart , thanks for this!

It looks like we explicitly test with --all-features in the script we run in CI, but I don't see any reason we should break cargo test --all.

opentelemetry-rust/scripts/test.sh

Line 10 in d721037

cargo test --workspace --all-features --lib

[svencowart]

Hey @svencowart , thanks for this!

It looks like we explicitly test with --all-features in the script we run in CI, but I don't see any reason we should break cargo test --all.

opentelemetry-rust/scripts/test.sh

Line 10 in d721037

cargo test --workspace --all-features --lib

This make sense. Especially because the contribution specifically calls out to use cargo test --all.