internal/rosa: populate runtime dependencies

This also removes manually resolved indirect dependencies.

Signed-off-by: Ophestra <cat@gensokyo.uk>

internal/rosa/squashfs.go

@@ -48,6 +48,12 @@ func init() {
 		Description: "tools to create and extract Squashfs filesystems",
 		Website:     "https://github.com/plougher/squashfs-tools",
 
+		Dependencies: P{
+			Zstd,
+			Gzip,
+			Zlib,
+		},
+
 		ID: 4879,
 	}
 }