use `type=unused` org and repo collections

mentioned in commit 8a3e6d6e

mentioned in merge request !1715 (merged)

mentioned in commit 0a851554

mentioned in commit 1066e456

mentioned in commit 5c1be149

mentioned in merge request !1720 (merged)

mentioned in commit 59aad2ff

mentioned in commit 9dbf7627

mentioned in commit 62ab2c28

mentioned in commit b66b2636