internal/rosa/make: migrate to helper interface

This also updates all affected artifacts to use new behaviour.

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

internal/rosa/xz.go

@@ -7,13 +7,13 @@ func (t Toolchain) newXZ() pkg.Artifact {
 		version  = "5.8.2"
 		checksum = "rXT-XCp9R2q6cXqJ5qenp0cmGPfiENQiU3BWtUVeVgArfRmSsISeUJgvCR3zI0a0"
 	)
-	return t.NewViaMake("xz", version, pkg.NewHTTPGetTar(
+	return t.NewPackage("xz", version, pkg.NewHTTPGetTar(
 		nil, "https://github.com/tukaani-project/xz/releases/download/"+
 			"v"+version+"/xz-"+version+".tar.bz2",
 		mustDecode(checksum),
 		pkg.TarBzip2,
-	), nil,
-		t.Load(Diffutils),
+	), nil, (*MakeHelper)(nil),
+		Diffutils,
 	)
 }
 func init() { artifactsF[XZ] = Toolchain.newXZ }