* New docs [Separate OpenAPI Schemas for Input and Output or Not](https://fastapi.tiangolo.com/how-to/separate-openapi-schemas/).
    * This PR also includes a new setup (internal tools) for generating screenshots for the docs.

### Refactors

* Add new Prometheus metric that monitors the remaining lifetime of certificates used to authenticate requests to the API server. ([#50387](https://github.com/kubernetes/kubernetes/pull/50387), [@jcbsmpsn](https://github.com/jcbsmpsn))

      - [add-ons:](#add-ons)
      - [kube-scheduler:](#kube-scheduler)
      - [Other deprecations:](#other-deprecations)
    - [API Change](#api-change-6)
      - [New API types/versions:](#new-api-typesversions)
      - [New API fields:](#new-api-fields)
      - [Other API changes:](#other-api-changes)
      - [Configuration file changes:](#configuration-file-changes)
      - [kube-apiserver:](#kube-apiserver-2)

- Added a new command line argument `--interactive` to kubectl. The new command line argument lets a user confirm deletion requests per resource interactively. ([#114530](https://github.com/kubernetes/kubernetes/pull/114530), [@ardaguclu](https://github.com/ardaguclu)) [SIG CLI and Testing]
- Added a new feature gate, `SchedulerQueueingHints` (enabled by default).

Extensibility. SIG API Machinery added a new class of admission control webhooks (mutating), and brought the admission control webhooks to beta.

### Apps

The core workloads API, which is composed of the DaemonSet, Deployment, ReplicaSet, and StatefulSet kinds, has been promoted to GA stability in the apps/v1 group version. As such, the apps/v1beta2 group version is deprecated, and all new code should use the kinds in the apps/v1 group version.

* kubeadm: When certificates are present joining a new control plane make sure that they match at least the required SANs ([#73093](https://github.com/kubernetes/kubernetes/pull/73093), [@ereslibre](https://github.com/ereslibre))

- Added a new `ServiceCIDR` type that allows to dynamically configure the cluster range used to allocate `Service ClusterIPs` addresses. ([#116516](https://github.com/kubernetes/kubernetes/pull/116516), [@aojea](https://github.com/aojea))
- Added a new `ipMode` field to the `.status` of Services where `type` is set to `LoadBalancer`.

* ConfigMap objects now support binary data via a new `binaryData` field. When using `kubectl create configmap --from-file`, files containing non-UTF8 data will be placed in this new field in order to preserve the non-UTF8 data. Use of this feature requires 1.10+ apiserver and kubelets. ([#57938](https://github.com/kubernetes/kubernetes/pull/57938), [@dims](https://github.com/dims))

- Added a new IPAddress object kind
  - Added a new ClusterIP allocator. The new allocator removes previous Service CIDR block size limitations for IPv4, and limits IPv6 size to a /64 ([#115075](https://github.com/kubernetes/kubernetes/pull/115075), [@aojea](https://github.com/aojea)) [SIG API Machinery, Apps, Auth, CLI, Cluster Lifecycle, Network and Testing]

## Changelog since v1.7.0

### Other notable changes

* Added new flag to `kubeadm init`: --node-name, that lets you specify the name of the Node object that will be created ([#48594](https://github.com/kubernetes/kubernetes/pull/48594), [@GheRivero](https://github.com/GheRivero))