Expose the podManagementPolicy for jenkins-controller-statefulset

[UkonnRa]

What this PR does / why we need it

Expose .spec.podManagementPolicy to make the pod rollback-able from the broken state

Which issue this PR fixes

• https://github.com/jenkinsci/helm-charts/issues/688

Special notes for your reviewer

Checklist

• [x] DCO signed
• [ ] Chart Version bumped
• [ ] CHANGELOG.md was updated

[UkonnRa]

Any update? What else do I need to do?

[timja]

Any update? What else do I need to do?

needs a passing build