GHSA-5jpj-293f-rhvj: KubeEdge: Command Injection in NodeUpgradeJob - RCE on edge nodes via v1alpha2 API

## Impact The KubeEdge NodeUpgradeJob handler constructed the `keadm upgrade edge` command by concatenating the user-controlled `spec.version` and `spec.image` fields into a shell command. An authenticated user with permission to create or update `NodeUpgradeJob` resources through the v1alpha2 API could include shell metacharacters in either field. When the upgrade job was processed, the injected command could be executed on the targeted edge node with the privileges available to the upgrade process. …