build(deps): bump github.com/elastic/elastic-agent-libs in /testing (#5243)

Bumps [github.com/elastic/elastic-agent-libs](https://github.com/elastic/elastic-agent-libs) from 0.22.0 to 0.22.1.
- [Release notes](https://github.com/elastic/elastic-agent-libs/releases)
- [Commits](elastic/elastic-agent-libs@v0.22.0...v0.22.1)

---
updated-dependencies:
- dependency-name: github.com/elastic/elastic-agent-libs
  dependency-version: 0.22.1
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]