[9.2](backport #34908) [Snyk] Security upgrade alpine from 3.15 to 3.16

[mergify[bot]]

This PR was automatically created by Snyk using the credentials of a real user.

Keeping your Docker base image up-to-date means you’ll benefit from security fixes in the latest version of your chosen image.

Changes included in this PR

• dev-tools/kubernetes/filebeat/Dockerfile.debug

We recommend upgrading to alpine:3.16, as this image has only 0 known vulnerabilities. To do this, merge this pull request, then verify your application still works as expected.

---

Note: You are seeing this because you or someone else with access to this repository has authorized Snyk to open fix PRs.

For more information: 🧐 View latest project report

🛠 Adjust project settings

---

Learn how to fix vulnerabilities with free interactive lessons:

🦉 Learn about vulnerability in an interactive lesson of Snyk Learn.

---

This is an automatic backport of pull request #34908 done by [Mergify](https://mergify.com).

[cla-checker-service[bot]]

💚 CLA has been signed

[github-actions[bot]]

:robot: GitHub comments

Just comment with:

• run docs-build : Re-trigger the docs validation. (use unformatted text in the comment!)

[elasticmachine]

Pinging @elastic/elastic-agent-data-plane (Team:Elastic-Agent-Data-Plane)