Bump firebase-tools from 13.31.2 to 14.3.1 in /integration-tests

Bumps [firebase-tools](https://github.com/firebase/firebase-tools) from 13.31.2 to 14.3.1.
- [Release notes](https://github.com/firebase/firebase-tools/releases)
- [Changelog](https://github.com/firebase/firebase-tools/blob/master/CHANGELOG.md)
- [Commits](firebase/firebase-tools@v13.31.2...v14.3.1)

---
updated-dependencies:
- dependency-name: firebase-tools
  dependency-version: 14.3.1
  dependency-type: direct:production
  update-type: version-update:semver-major
...

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Author: dependabot[bot]