Add CEL expressions support for Tolerations

Enhancement Description

This enhancement introduces and support CEL Taints and Tolerations.

Background

Current KEP #5471 focuses on integer operators and #5721 for SemVer support. Accommodating CEL expression would make scheduling more flexible and future-proof.

/sig scheduling /sig apps

• One-line enhancement description (can be used as a release note): Add CEL expression Support to Tolerations and NodeAffinity
• Kubernetes Enhancement Proposal:
• Discussion Link: https://github.com/kubernetes/enhancements/pull/5473#discussion_r2300260876
• PRs by stage and milestone:
  • Alpha - v1.xx
    • KEP (k/enhancements) update PR(s): https://github.com/kubernetes/enhancements/pull/5822
    • 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.