[nodejs] test(otel): enable otel tracestate sampling tests for nodejs

[vpellan]

Motivation

This PR has been merged: DataDog/dd-trace-js#10117

Changes

Enable otel tracestate sampling tests for nodejs

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[chatgpt-codex-connector]

Codex Review Summary

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Review	Status	Commit	Review trigger
📝 Code Review	✅ Completed 2026-10-01T09:47:18.224608Z	d8b9ffe	PR opened

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[github-actions]

CODEOWNERS have been resolved as:

manifests/nodejs.yml                                                    @DataDog/system-tests-reviewers
mirror_images.lock.yaml                                                 @DataDog/system-tests-core
mirror_images.yaml                                                      @DataDog/system-tests-core
utils/build/docker/base-images.lock.json                                @DataDog/system-tests-reviewers
utils/build/docker/nodejs/express/app.js                                @DataDog/system-tests-reviewers

[chatgpt-codex-connector]

💡 Codex Review

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Reviewed commit: d8b9ffe9be

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[datadog-datadog-prod-us1-2]

✅ All CI checks and tests passed.

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🧪 All tests passed
❄️ No new flaky tests detected

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