talosctl common commands to work with Omni

[smira]

Omni Talos API Proxy

For write operations, return an error from Omni saying that it's not allowed with Omni.

Talosctl (CLI)

talosctl reboot fails in particular as it reads bootid from the filesystem and that's not allowed.
talosctl reboot --wait=false works.

[github-actions]

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