* Some refactoring of error/status messages and functions to align with new approach.
* This PR will leverage subtests on the existing table tests for the scheduler units. ([#63661](https://github.com/kubernetes/kubernetes/pull/63661), [@xchapter7x](https://github.com/xchapter7x))
    * Some refactoring of error/status messages and functions to align with new approach.

The main milestones for SIG Network this release are the graduation of IPVS-based load balancing and CoreDNS to general availability.

IPVS is an alternative approach to in-cluster load balancing that uses in-kernel hash tables rather than the previous iptables approach, while CoreDNS is a replacement for kube-dns for service discovery.

### SIG Node

Kubernetes primitives that our Cluster Federation control plane
supports, expanding the number of approaches taken to multi-cluster
management (beyond our initial Federation approach), and preparing
to release Federation for general availability ('GA').

[SIG Multi-cluster]: https://github.com/kubernetes/community/tree/master/sig-federation

### SIG Node