bootc: use a couple of bootc new features

See bootc-dev/bootc#1978
And bootc-dev/bootc#1909

Author: jbtrystram

src/osbuild-manifests/coreos.osbuild.x86_64.bootc.mpp.yaml

@@ -341,6 +341,10 @@ pipelines:
           # See github.com/bootc-dev/bootc/issues/1441
           boot-mount-spec: ""
           root-mount-spec: ""
+          # We don't want bootupd to stamp the boot and UEFI paritions
+          # with the boot uuid because these will change at first boot.
+          # See https://github.com/coreos/fedora-coreos-config/pull/3898
+          bootupd-skip-boot-uuid: true
         devices:
           disk:
             type: org.osbuild.loopback
@@ -390,6 +394,10 @@ pipelines:
             partition:
               mpp-format-int: '{image.layout[''boot''].partnum}'
             target: /boot
+      # We historically created an aleph file named .coreos-aleph-version.json
+      # in the sysroot partition, for debugging purposes. bootc create it's
+      # own that is mostly the same content. Let's make a symlink to it
+      # for backward compatibility.
       - type: org.osbuild.ln
         options:
           paths:
@@ -617,6 +625,10 @@ pipelines:
           # See github.com/bootc-dev/bootc/issues/1441
           boot-mount-spec: ""
           root-mount-spec: ""
+          # We don't want bootupd to stamp the boot and UEFI paritions
+          # with the boot uuid because these will change at first boot.
+          # See https://github.com/coreos/fedora-coreos-config/pull/3898
+          bootupd-skip-boot-uuid: true
         devices:
           disk:
             type: org.osbuild.loopback

src/supermin-init-prelude.sh

@@ -97,3 +97,11 @@ cat > /usr/lib/ostree/prepare-root.conf <<EOF
 [composefs]
 enabled = true
 EOF
+
+# TODO move this to an overlay in fedora-coreos-config
+# so it get baked into the container at build time. We
+# want the container to be the source of truth as much as possible.
+cat <<EOF > /usr/lib/bootc/install/10-ostree.toml
+[install.ostree]
+bls-append-except-default = 'grub_users=""'
+EOF