* The garbage collector now cascades deletion properly when deleting an object with propagationPolicy="background". This resolves issue [#44046](https://github.com/kubernetes/kubernetes/issues/44046), so that when a deployment is deleted with propagationPolicy="background", the garbage collector ensures dependent pods are deleted as well. ([#44058](https://github.com/kubernetes/kubernetes/pull/44058), [@caesarxuchao](https://github.com/caesarxuchao))...