accept `context.Context` as a first argument. Signatures of Create, Update, and Patch methods have been updated to accept CreateOptions, UpdateOptions and PatchOptions respectively. Signatures of Delete and DeleteCollection methods now accept DeleteOptions by value instead of by reference. Generated clientsets with the previous interface have been added in new "deprecated" packages to allow incremental migration to the new APIs. The deprecated packages will be removed in the 1.21 release. A tool...

* The `initresource` admission plugin has been removed. ([#58784](https://github.com/kubernetes/kubernetes/pull/58784), [@wackxu](https://github.com/wackxu))
* `ObjectMeta `, `ListOptions`, and `DeleteOptions` have been removed from the core api group.  Please reference them in `meta/v1` instead. ([#61809](https://github.com/kubernetes/kubernetes/pull/61809), [@hzxuzhonghu](https://github.com/hzxuzhonghu))

* DELETE requests can now pass in their DeleteOptions as a query parameter or a body parameter, rather than just as a body parameter. ([#35806](https://github.com/kubernetes/kubernetes/pull/35806), [@bdbauer](https://github.com/bdbauer))

- Client-go: pass `DeleteOptions` down to the fake client `Reactor` ([#102945](https://github.com/kubernetes/kubernetes/pull/102945), [@chenchun](https://github.com/chenchun))

- Signatures on the dynamic client methods have been modified to accept `context.Context` as a first argument. Signatures of Delete and DeleteCollection methods now accept DeleteOptions by value instead of by reference. ([#88906](https://github.com/kubernetes/kubernetes/pull/88906), [@liggitt](https://github.com/liggitt)) [SIG API Machinery, Apps, CLI, Cluster Lifecycle, Storage and Testing]