Add --drain and --drain-timeout flags to `talosctl reboot` (default off)
and `talosctl upgrade` (default on) that cordon and drain the Kubernetes
node before rebooting, then wait for Ready and uncordon after it comes
back. When --drain is enabled, --wait is forced to true.
Signed-off-by: Mateusz Urbanek <mateusz.urbanek@siderolabs.com>
(cherry picked from commit 52b920032e97e1b241c1e0bd89c6e41cbc1c9a47)
9cc735588b