Fallback for HPA on failure to retrieve metrics

[be0x74a]

• One-line enhancement description (can be used as a release note): Fallback for HPA on failure to retrieve metrics
• Kubernetes Enhancement Proposal: KEP-5053: Fallback for HPA on failure to retrieve metrics #5054
• Discussion Link: https://kubernetes.slack.com/archives/C09R1LV8S/p1736868782365929
• Primary contact (assignee): @be0x74a
• Responsible SIGs: sig/autoscaling
• Enhancement target (which target equals to which milestone):
  • Alpha release target (x.y):
  • Beta release target (x.y):
  • Stable release target (x.y):
• Alpha
  • 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.

[be0x74a]

/sig autoscaling