updating comments based on CI results

- also adjusted singleton test to use Servers level since that's what we are classifying them as

Author: ogapo

godot-codegen/src/special_cases/special_cases.rs

@@ -1036,7 +1036,6 @@ pub fn classify_codegen_level(class_name: &str) -> Option<ClassCodegenLevel> {
         | "RenderSceneData" | "RenderSceneDataExtension"
         => ClassCodegenLevel::Servers,
         // Declared final (un-inheritable) in Rust, but those are still servers.
-        // NOTE: while these _types_ are available at Server level, the singletons themselves are actually not available until _even after_ Editor level.
         | "AudioServer" | "CameraServer" | "NavigationServer2D" | "NavigationServer3D" | "RenderingServer" | "TranslationServer" | "XRServer" | "DisplayServer"
         => ClassCodegenLevel::Servers,
 

itest/rust/src/lib.rs

@@ -33,11 +33,11 @@ unsafe impl ExtensionLibrary for framework::IntegrationTests {
                 // Make sure we can access early core singletons.
                 object_tests::test_early_core_singletons();
             }
-            InitLevel::Servers => {}
-            InitLevel::Scene => {
+            InitLevel::Servers => {
                 // Make sure we can access server singletons by now.
-                object_tests::test_general_singletons();
+                object_tests::test_server_singletons();
             }
+            InitLevel::Scene => {}
             InitLevel::Editor => {}
         }
     }

itest/rust/src/object_tests/init_level_test.rs

@@ -60,7 +60,7 @@ pub fn test_early_core_singletons() {
 }
 
 // Runs during scene init level to ensure we can access general singletons in the Scene init call for the extension as a whole.
-pub fn test_general_singletons() {
+pub fn test_server_singletons() {
     let mut rendering = godot::classes::RenderingServer::singleton();
     assert!(rendering.get_test_cube() != godot::builtin::Rid::Invalid);
 }