Release v0.16.16

Summary of Changes

Minor Changes:

• connectivity: test namespace param (cilium/cilium#34428, @viktor-kurchenko)

Misc Changes:

• hooks: support concurrent tests run (cilium/cilium#34427, @viktor-kurchenko)

Other Changes:

• Update stable release to v0.16.15 by @michi-covalent in #2749
• chore(deps): update golang docker tag to v1.22.6 by @renovate in #2745
• Update CODEOWNERS by @michi-covalent in #2763
• Remove the repo lock workflow by @michi-covalent in #2762
• chore(deps): update actions/upload-artifact action to v4.3.5 by @renovate in #2741
• chore(deps): update docker/build-push-action action to v6.6.0 by @renovate in #2747
• chore(deps): update go to v1.22.6 (patch) by @renovate in #2751
• chore(deps): update dependency cilium/cilium to v1.16.1 by @renovate in #2757
• chore(deps): update golangci/golangci-lint docker tag to v1.60.1 by @renovate in #2756
• chore(deps): update golang-images (minor) by @renovate in #2754
• chore(deps): update all github action dependencies (minor) by @renovate in #2767
• chore(deps): update all github action dependencies (patch) by @renovate in #2766
• Prepare for v0.16.16 release by @michi-covalent in #2771