build: set record provenance in response

Signed-off-by: CrazyMax <1951866+crazy-max@users.noreply.github.com>

commands/bake.go

@@ -202,12 +202,12 @@ func runBake(ctx context.Context, dockerCli command.Cli, targets []string, in ba
 		return nil
 	}
 
-	// local state group
 	groupRef := identity.NewID()
 	var refs []string
 	for k, b := range bo {
 		b.Ref = identity.NewID()
 		b.GroupRef = groupRef
+		b.WithProvenanceResponse = len(in.metadataFile) > 0
 		refs = append(refs, b.Ref)
 		bo[k] = b
 	}