Release prep v4.16.0

[github-actions[bot]]

Automated release-prep through pdk-templates from commit c9fe71d38457d5784bbc9f13a5e2409418c64458. Please verify before merging:

• [ ] last nightly run is green
• [ ] Changelog is readable and has no unlabeled pull requests
• [ ] Ensure the changelog version and metadata version match