common: (Re-)add gnupg2-scdaemon

Re-add the gnupg2-scdaemon to keep Yubikeys and other similar devices
working on Atomic Desktops out of the box. This package was dropped in
F43 following the split of the GnuPG package and we did not announce its
removal. Given its size, it is not really an interesting candidate for
removal as there is no known downside for keeping it included and it
provides functionnality users rely on. Thus we manually re-add it in the
manifests.

Fixes: https://gitlab.com/fedora/ostree/sig/-/issues/101
See: https://fedoraproject.org/wiki/Changes/Modular_GnuPG_Packaging
See: https://discussion.fedoraproject.org/t/gpg-with-yubikeys-on-fedora-43-scdaemon-removed/170981

common.yaml

@@ -108,6 +108,8 @@ packages:
   - splix
   # See: https://github.com/fedora-silverblue/issue-tracker/issues/390
   - wireguard-tools
+  # See: https://gitlab.com/fedora/ostree/sig/-/issues/101
+  - gnupg2-scdaemon
 
 selinux: true
 documentation: true