Main goal is to reduce signing logic duplication between the systemd-boot
and UKI generation.
However, this quickly snowballed into wanting to actually verify
by providing a custom secure boot keys to bcvk that things worked.
This depends on https://github.com/bootc-dev/bcvk/pull/170
Now as part of that, I ran into what I think are bugs in pesign;
this cuts things back over to using sbsign. I'll file a tracker for that
separately.
Finally as part of this, just remove the TMT example that builds
a sealed image but doesn't actually verify it works - it's already
drifted from what we do outside here. Ultimately what we need
is to shift some of this into the Fedora examples and we just
fetch it here anyways.
Assisted-by: Claude Code (Sonnet 4.5)
Signed-off-by: Colin Walters <walters@verbum.org>
