Update tools, pkgs and extras to use fully bootstrapped [Stageˣ]-derived toolchain for building Talos and its dependencies.
This brings in changes related to root being usrmerged now, so some paths have changed. Extras have been cleaned up: use only the needed package.
Addresses: #10187
Signed-off-by: Dmitry Sharshakov <dmitry.sharshakov@siderolabs.com>