feat: resource renaming for http contribs (gin, chi, ...)

[e-n-0]

What does this PR do?

Motivation

Reviewer's Checklist

• Changed code has unit tests for its functionality at or near 100% coverage.
• System-Tests covering this feature have been added and enabled with the va.b.c-dev version tag.
• There is a benchmark for any new code, or changes to existing code.
• If this interacts with the agent in a new way, a system test has been added.
• New code is free of linting errors. You can check this by running ./scripts/lint.sh locally.
• Add an appropriate team label so this PR gets put in the right place for the release notes.
• Non-trivial go.mod changes, e.g. adding new modules, are reviewed by @DataDog/dd-trace-go-guild.

Unsure? Have a question? Request a review!

[datadog-official]

✅ Tests

🎉 All green!

❄️ No new flaky tests detected
🧪 All tests passed

_{This comment will be updated automatically if new data arrives.
🔗 Commit SHA: da67f3d | Docs | Datadog PR Page | Was this helpful? Give us feedback!}

[codecov]

Codecov Report

❌ Patch coverage is 64.00000% with 9 lines in your changes missing coverage. Please review.
✅ Project coverage is 54.70%. Comparing base (886ce05) to head (da67f3d).
⚠️ Report is 1 commits behind head on main.

Files with missing lines	Patch %	Lines
instrumentation/httptrace/resource_renaming.go	61.90%	8 Missing ⚠️
instrumentation/httptrace/before_handle.go	75.00%	1 Missing ⚠️

Additional details and impacted files

Files with missing lines	Coverage Δ
instrumentation/httptrace/before_handle.go	84.00% <75.00%> (-2.45%)	⬇️
instrumentation/httptrace/resource_renaming.go	61.90% <61.90%> (ø)

... and 4 files with indirect coverage changes

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.

[pr-commenter]

Benchmarks

Benchmark execution time: 2025-12-22 14:17:27

Comparing candidate commit da67f3d in PR branch flavien/resource-renaming-contribs with baseline commit e744f8a in branch main.

Found 0 performance improvements and 0 performance regressions! Performance is the same for 15 metrics, 0 unstable metrics.