chore(deps): bump @google-cloud/trace-agent (#452)

Bumps [@google-cloud/trace-agent](https://github.com/googleapis/cloud-trace-nodejs) from 5.1.6 to 7.1.0.
- [Release notes](https://github.com/googleapis/cloud-trace-nodejs/releases)
- [Changelog](https://github.com/googleapis/cloud-trace-nodejs/blob/main/CHANGELOG.md)
- [Commits](googleapis/cloud-trace-nodejs@v5.1.6...v7.1.0)

---
updated-dependencies:
- dependency-name: "@google-cloud/trace-agent"
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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