Move python3-libdnf5 to fedora only

ref https://gitlab.com/redhat/centos-stream/containers/bootc/-/merge_requests/558#note_2492110138

Signed-off-by: Colin Walters <walters@verbum.org>

fedora-standard.yaml

@@ -1,3 +1,7 @@
 include:
   - fedora-includes/generic.yaml
   - standard/manifest.yaml
+
+packages:
+  # Make Ansible "package" builtin work by default
+  - python3-libdnf5

standard/manifest.yaml

@@ -42,8 +42,6 @@ packages:
   - zram-generator
   # This one is in Python so isn't in FCOS, but we can safely add it here.
   - sos
-  # Make Ansible "package" builtin work by default
-  - python3-libdnf5
   # Make Ansible "package_facts" builtin work by default
   - python3-rpm
 

tests/rootfs/cases/fedora-only

@@ -0,0 +1,13 @@
+#!/bin/bash
+set -xeuo pipefail
+. /usr/lib/os-release
+case "${ID}" in
+    fedora)
+        # https://gitlab.com/fedora/bootc/base-images/-/merge_requests/172
+        if rpm -q python3 &>/dev/null; then
+            rpm -q python3-libdnf5
+        fi
+    ;;
+    *) 
+    ;;
+esac