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01bf663854
Implement kernel args support in cluster templates. Managing kernel args via templates is opt-in: only and only if the `kernelArgs` YAML key is defined on a `Cluster`, `ControlPlane`, `Worker` or `Machine`, the matching `KernelArgs` resource will be created/updated. Lower levels override higher levels (Cluster -> MachineSet -> Machine). Unlike other cluster template managed resources, they will never be destroyed, i.e, when they are removed from a template (removed completely, as in, `kernelArgs` key doesn't exist) or when `omnictl cluster template delete` is run. They instead will get updated to have the annotation `omni.sidero.dev/managed-by-cluster-templates` removed from them. Add the new flag `--include-kernel-args` to the `omnictl cluster template export` command to optionally include them in the exported template. Note: when this flag is set, `kernelArgs` key is always included at per-machine level, not pulled up even if they are the same for all machines in a machine set or a cluster. Update the frontend, specifically the kernel args update screen to warn the user if kernel args for that machine is managed by templates, similar to what we do for clusters. Signed-off-by: Utku Ozdemir <utku.ozdemir@siderolabs.com>