internal/rosa: create metadata alongside artifact

This enables deferring evaluation of azalea-based packages and fixes the longstanding quirk of version being disjoint from other metadata.

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

internal/rosa/state_test.go

@@ -10,7 +10,7 @@ func TestLoad(t *testing.T) {
 	t.Parallel()
 
 	for _, p := range rosa.Native().Collect() {
-		t.Run(rosa.Native().MustGet(p).Name, func(t *testing.T) {
+		t.Run(p.String(), func(t *testing.T) {
 			t.Parallel()
 
 			rosa.Native().Std().MustLoad(p)