chore: bump kube-stack Helm chart onboarding to 0.16.0

[jmmcorreia]

Summary

Update to the latest kube-stack version. It will allow to later update kube-stack configuration to modify SecurityContext for cleanup job pod (open-telemetry/opentelemetry-helm-charts#2187)

This change has a dependency on PR elastic/elastic-agent#15013

Checklist

Check the PR satisfies following conditions.

Reviewers should verify this PR satisfies this list as well.

• Any text added follows EUI's writing guidelines, uses sentence case text and includes i18n support
• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
• If a plugin configuration key changed, check if it needs to be allowlisted in the cloud and added to the docker list
• This was checked for breaking HTTP API changes, and any breaking changes have been approved by the breaking-change committee. The release_note:breaking label should be applied in these situations.
• Flaky Test Runner was used on any tests changed
• The PR description includes the appropriate Release Notes section, and the correct release_note:* label is applied per the guidelines
• Review the backport guidelines and apply applicable backport:* labels.

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[kibanamachine]

💛 Build succeeded, but was flaky

• Buildkite Build
• Commit: d1c0dff
• Build duration: 56 mins

Failed CI Steps

• FTR Configs #137

Test Failures

• [job] [logs] FTR Configs #137 / X-Pack Accessibility Tests - Group 3 "after all" hook: afterTestSuite.trigger in "X-Pack Accessibility Tests - Group 3"
• [job] [logs] FTR Configs #137 / X-Pack Accessibility Tests - Group 3 Remote Clusters Accessibility "after all" hook: afterTestSuite.trigger in "Remote Clusters Accessibility"
• [job] [logs] FTR Configs #137 / X-Pack Accessibility Tests - Group 3 Remote Clusters Accessibility "before all" hook in "Remote Clusters Accessibility"

Metrics [docs]

✅ unchanged

History

• 💔 Build #458734 failed 4bbca11
• 💔 Build #458688 failed ed48191