Enhancement Description

• One-line enhancement description (can be used as a release note): Add a schedulingGates field to the Pod spec that marks a Pod's scheduling readiness.
• Kubernetes Enhancement Proposal: 3521-pod-scheduling-readiness/README.md
• Discussion Link: https://docs.google.com/document/d/1cPxF3wIbGRw_inv4CCG6z6qC4WjHAPR5GLT__dRBx7I/edit#
• Primary contact (assignee): @Huang-Wei
• Responsible SIGs: sig-scheduling
• Enhancement target (which target equals to which milestone):
  • Alpha release target (x.y): 1.26
  • Beta release target (x.y): 1.27
  • Stable release target (x.y): 1.30

# Alpha
- [ ] #3522 
- [ ] https://github.com/kubernetes/kubernetes/pull/113274
- [ ] https://github.com/kubernetes/kubernetes/pull/113275
- [ ] https://github.com/kubernetes/kubernetes/pull/113442
- [ ] https://github.com/kubernetes/kubernetes/pull/113946
- [ ] https://github.com/kubernetes/website/pull/37675

# Beta
- [ ] #3739
- [ ] https://github.com/kubernetes/kubernetes/issues/113608
- [ ] https://github.com/kubernetes/website/pull/39773

# Stable
- [ ] #4455
- [ ] https://github.com/kubernetes/kubernetes/pull/123575
- [ ] https://github.com/kubernetes/website/pull/45234

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