maxUnavailable for StatefulSets

[krmayankk]

Enhancement Description

• One-line enhancement description (can be used as a release note): Implement maxUnavailable for StatefulSets
• Kubernetes Enhancement Proposal: https://github.com/kubernetes/enhancements/blob/master/keps/sig-apps/961-maxunavailable-for-statefulset/README.md
• Primary contact (assignee): @atiratree @knelasevero
• Responsible SIGs: sig-apps
• Enhancement target (which target equals to which milestone):
  • Alpha release target (x.y): 1.24
  • Beta release target (x.y): 1.31
  • Stable release target (x.y): TBD
• [x] Alpha
  • [x] KEP (k/enhancements) update PR(s): https://github.com/kubernetes/enhancements/pull/678 https://github.com/kubernetes/enhancements/pull/1010 https://github.com/kubernetes/enhancements/pull/2688 https://github.com/kubernetes/enhancements/pull/2889 https://github.com/kubernetes/enhancements/pull/3100
  • [x] Code (k/k) update PR(s): https://github.com/kubernetes/kubernetes/pull/82162
  • [x] Docs (k/website) update PR(s): https://github.com/kubernetes/website/pull/32596
• [ ] Beta
  • [ ] KEP (k/enhancements) update PR(s): https://github.com/kubernetes/enhancements/pull/3997
  • [ ] Code (k/k) update PR(s):
  • [ ] Docs (k/website) update(s):