Merge master into dev-1.21 to keep in sync, plus latest API reference

This sync merge includes API reference updates.

static/_redirects

@@ -29,6 +29,7 @@
 /docs/admin/authorization/rbac.md     /docs/admin/authorization/rbac/ 301
 /docs/admin/cluster-components/     /docs/concepts/overview/components/ 301
 /docs/admin/cluster-management/     /docs/tasks/administer-cluster/ 302
+/id/docs/admin/cluster-management/     /id/docs/tasks/administer-cluster/ 302
 /docs/admin/cluster-troubleshooting/     /docs/tasks/debug-application-cluster/debug-cluster/ 301
 /docs/admin/daemons/     /docs/concepts/workloads/controllers/daemonset/ 301
 /docs/admin/disruptions/     /docs/concepts/workloads/pods/disruptions/ 301
@@ -509,3 +510,4 @@
 /docs/tasks/tools/install-minikube/     https://minikube.sigs.k8s.io/docs/start/     302
 
 /docs/concepts/configuration/pod-overhead/     /docs/concepts/scheduling-eviction/pod-overhead/   301
+/id/docs/concepts/configuration/pod-overhead/     /id/docs/concepts/scheduling-eviction/pod-overhead/   301