put `talosctl dashboard` on a virtual tty

[smira]

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Feature Request

After boot Talos should keep console logs on one tty9, and switch tty1 (0?) to display talosctl dashboard with summary view as a default.

Description

• are we missing any kernel config?
• how to implement switching between virtual ttys?
• how to redirect console logs to another tty?

[smira]

setting up virtual consoles: https://github.com/systemd/systemd/blob/main/src/vconsole/vconsole-setup.c

[flokli]

This should probably only apply to servers with multiple (functional) ttys.

Headless VMs, or SBCs without a GPU should probably only show their console logs on the serial port (which has a too small "screen size" anyways to make the dashboard useful)

[utkuozdemir]

https://github.com/siderolabs/talos/pull/6879