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/nss.go

@@ -67,9 +67,7 @@ cp -r \
 	), version
 }
 func init() {
-	native.MustRegister(&Artifact{
-		f: Toolchain.newNSS,
-
+	native.mustRegister(Toolchain.newNSS, &Metadata{
 		Name:        "nss",
 		Description: "Network Security Services",
 		Website:     "https://firefox-source-docs.mozilla.org/security/nss/index.html",
@@ -120,9 +118,7 @@ buildcatrust \
 `), Unversioned
 }
 func init() {
-	native.MustRegister(&Artifact{
-		f: Toolchain.newNSSCACert,
-
+	native.mustRegister(Toolchain.newNSSCACert, &Metadata{
 		Name:        "nss-cacert",
 		Description: "bundle of X.509 certificates of public Certificate Authorities",
 		Website:     "https://curl.se/docs/caextract.html",