Merge pull request #35 from gardenlinux/trim-packages

* bird2 only used by ironcore, it was removed in favour of frr gardenlinux/gardenlinux@8822084
* bubblewrap only used by ostree poc, we can remove dependency now https://gitlab.com/gardenlinux/gardenlinux-package-build/-/commit/c6a24462d6dba7490884c97fcbd235d114d14692
* pristine-lfs was used by old package-build in gitlab, we now store everything in OCI, S3 or GitHub artifacts - nothing in git LFS via pristine-lfs tool.

package-imports

@@ -9,10 +9,8 @@ auditd
 awscli
 azure-vm-utils
 binutils
-bird2
 bsdextrautils
 btrfs-progs
-bubblewrap
 build-essential
 ca-certificates
 ceph
@@ -106,7 +104,6 @@ pciutils
 pkexec
 podman
 polkitd
-pristine-lfs
 python3-apt
 python3-cffi-backend
 python3-click