refactor(unified-storage): move generated protos to own pkg (#105356)

pkg/storage/unified/resource/document_test.go

@@ -8,6 +8,8 @@ import (
 	"testing"
 
 	"github.com/stretchr/testify/require"
+
+	"github.com/grafana/grafana/pkg/storage/unified/resourcepb"
 )
 
 func TestStandardDocumentBuilder(t *testing.T) {
@@ -16,7 +18,7 @@ func TestStandardDocumentBuilder(t *testing.T) {
 
 	body, err := os.ReadFile("testdata/playlist-resource.json")
 	require.NoError(t, err)
-	doc, err := builder.BuildDocument(ctx, &ResourceKey{
+	doc, err := builder.BuildDocument(ctx, &resourcepb.ResourceKey{
 		Namespace: "default",
 		Group:     "playlists.grafana.app",
 		Resource:  "playlists",