PDB for Multi-Pod Replicas

[LogicalShark]

Enhancement Description

• One-line enhancement description (can be used as a release note): Add field to PodDisruptionBudget to enable multi-pod behavior
• Kubernetes Enhancement Proposal: https://github.com/kubernetes/enhancements/pull/5671/files
• Discussion Link: sig/apps https://youtu.be/m6L5vUFqyC4?si=56JCP4c02UcGwfjf
• PRs by stage and milestone:
  • Alpha - v1.36
    • KEP (k/enhancements) update PR(s):
    • Code (k/k) update PR(s):
    • Docs (k/website) update PR(s):

Please keep this description up to date. This will help the Enhancement Team to track the evolution of the enhancement efficiently.

[LogicalShark]

/sig apps
/sig scheduling
/sig autoscaling