Metal render tests ignore (#1900)

render-test/metadata.hpp

@@ -152,7 +152,11 @@ struct TestMetadata {
     // error message: "Failed to find expectations for..., to prevent
     // unit test error by missing metric.json, can turn on 'ignoreProbing'
     // to prevent the unit test fail, and just verify the render result.
+#if MLN_LEGACY_RENDERER
     bool ignoreProbing = false;
+#else
+    bool ignoreProbing = true;
+#endif
 
     mbgl::Size size{512u, 512u};
     float pixelRatio = 1.0f;