Add bootc to eln

To do this though add a `distro` variable we can use to differentiate
between stream9 vs not-stream9 for now.

bootc exists now in eln since
- https://pagure.io/pungi-fedora/pull-request/1217
- https://github.com/minimization/content-resolver-input/pull/1006

tier-0/bootc.yaml

@@ -1,11 +1,7 @@
-include:
-  - ostree.yaml
-
 # The bootc components.
 packages:
  - systemd
- # For now this will be shipped in rpm-ostree; TODO fix this by shipping a separate epackage
- # - bootc
+ - bootc
  # Required by bootc install today, though we'll likely switch bootc to use a Rust crate instead of sgdisk
  - gdisk xfsprogs e2fsprogs dosfstools
 
@@ -16,12 +12,6 @@ exclude-packages:
   - kernel-debug-core
 
 postprocess:
-  # rpm-ostree can be an alias for bootc, we want to enable that here.
-  - |
-    #!/usr/bin/env bash
-    if test ! -x /usr/bin/bootc && test -x /usr/bin/rpm-ostree; then
-      ln -sr /usr/bin/{rpm-ostree,bootc}
-    fi
   # XFS is our default filesystem
   - |
     #!/usr/bin/env bash

tier-0/manifest.yaml

@@ -49,8 +49,12 @@ remove-from-packages:
   # https://bugzilla.redhat.com/show_bug.cgi?id=2105177
   - [dbus-common, /usr/lib/sysusers.d/dbus.conf]
 
+conditional-include:
+  - if: distro != "stream9"
+    include: bootc.yaml
+
 include:
-  - bootc.yaml
+  - ostree.yaml
   - initramfs.yaml
 
 packages: