MTFF: Allow viewers access in cloud (#114607)

* Reapply "K8s: read resource configs from API Enablement for API Builders" (#114475)

This reverts commit 4130bd9cd3.

* revert part that broke things

* FF service changes are gonna come later

* MTFF: allow viewers access to MTFF by enforcing runtime_config for custom routes

* unused var

* removed now

* pass the test, include defaults

* revert sample.ini change

pkg/tests/apis/playlist/playlist_test.go

@@ -50,7 +50,8 @@ func TestIntegrationPlaylist(t *testing.T) {
 		}))
 
 		// The accepted verbs will change when dual write is enabled
-		disco := h.GetGroupVersionInfoJSON("playlist.grafana.app")
+		disco, err := h.GetGroupVersionInfoJSON("playlist.grafana.app")
+		require.NoError(t, err)
 		// t.Logf("%s", disco)
 		require.JSONEq(t, `[
 			{