chore(deps): bump backoff from 1.11.1 to 2.2.1 in /test/requirements

Bumps [backoff](https://github.com/litl/backoff) from 1.11.1 to 2.2.1.
- [Release notes](https://github.com/litl/backoff/releases)
- [Changelog](https://github.com/litl/backoff/blob/master/CHANGELOG.md)
- [Commits](https://github.com/litl/backoff/compare/v1.11.1...v2.2.1)

---
updated-dependencies:
- dependency-name: backoff
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

test/requirements/python-requirements.txt

@@ -1,4 +1,4 @@
-backoff==1.11.1
+backoff==2.2.1
 docker-compose==1.29.2
 docker==5.0.3
 pytest==7.2.0