move debian binary building to shared ci file

debian-binary.yml

+build:binary:buster:
+  image: registry.git.cccv.de/infra/packages/docker-images/buster
+  extends: .build:binary
+
+build:binary:bullseye:
+  image: registry.git.cccv.de/infra/packages/docker-images/bullseye
+  extends: .build:binary
+
+package:apt:buster:
+  extends: .package:apt
+  dependencies:
+  - build:binary:buster
+  needs:
+  - build:binary:buster
+
+package:apt:bullseye:
+  extends: .package:apt
+  dependencies:
+  - build:binary:bullseye
+  needs:
+  - build:binary:bullseye
+
+# for now, publish the bullseye package for buster as well
+publish:apt:buster:
+  extends: .publish:apt
+  variables:
+    APTLY_DISTRO: buster
+  dependencies:
+  - package:apt:bullseye
+  needs:
+  - package:apt:bullseye
+
+publish:apt:bullseye:
+  extends: .publish:apt
+  variables:
+    APTLY_DISTRO: bullseye
+  dependencies:
+  - package:apt:bullseye
+  needs:
+  - package:apt:bullseye