`config.Container` implements a multi-doc container which implements
both `Container` interface (encoding, validation, etc.), and `Conifg`
interface (accessing parts of the config).
Refactor `generate` and `bundle` packages to support multi-doc, and
provide backwards compatibility.
Implement a first (mostly example) machine config document for
SideroLink API URL.
Many places don't properly support multi-doc yet (e.g. config patches).
Signed-off-by: Andrey Smirnov <andrey.smirnov@talos-systems.com>
Introduce a new resource, `SiderolinkConfig`, to store SideroLink connection configuration (api endpoint for now).
Introduce a controller for this resource which populates it from the Kernel cmdline.
Rework the SideroLink `ManagerController` to take this new resource as input and reconfigure the link on changes.
Additionally, if the siderolink connection is lost, reconnect to it and reconfigure the links/addresses.
Closessiderolabs/talos#7142, siderolabs/talos#7143.
Signed-off-by: Utku Ozdemir <utku.ozdemir@siderolabs.com>
