### Godot version

any version after 74458b6

### System information

Linux x64, but likely irrelevant

### Issue description

OpenXR action maps are not properly exported in recent builds of Godot 4: the `.res` file is small and does no longer seem to contain anything of use. In-game, no actions are passed on to OpenXR (obviously).

I bisected the issue down to https://github.com/godotengine/godot/commit/74458b6e9bed0f28db3374c7406eacbcf4b09b9d, which was merged in #70377.

### Steps to reproduce

1. Delete any previous export files (`.godot/exported/*/*.pkg`)
2. Perform an export (I did one for Android, but it likely works with anything)
3. Observe OpenXR actions not working in the export (error spam 'sync_action_sets: Condition "active_sets.size() == 0"'), and the exported action map file being very small (`.godot/exported/*/*.pkg`, from a few tens of kilobytes down to 296 bytes)

### Minimal reproduction project

Any OpenXR project can be used, such as https://github.com/BastiaanOlij/godot4_openxr_demo
Vector<String> files = p_preset->get_files_to_export();
		for (int i = 0; i < files.size(); i++) {
			paths.erase(files[i]);
		}
	} else if (p_preset->get_export_filter() == EditorExportPreset::EXPORT_CUSTOMIZED) {
		_export_find_customized_resources(p_preset, EditorFileSystem::get_singleton()->get_filesystem(), p_preset->get_file_export_mode("res://"), paths);
	} else {
		bool scenes_only = p_preset->get_export_filter() == EditorExportPreset::EXPORT_SELECTED_SCENES;
		Vector<String> files = p_preset->get_files_to_export();
		for (int i = 0; i < files.size(); i++) {
			if (scenes_only && ResourceLoader::get_resource_type(files[i]) != "PackedScene") {
				continue;
			}
			_export_find_dependencies(files[i], paths);
		}
		
		List<PropertyInfo> props;
		ProjectSettings::get_singleton()->get_property_list(&props);
		for (const PropertyInfo &pi : props) {
			if (!pi.name.begins_with("autoload/")) {
				continue;
			}
			String autoload_path = GLOBAL_GET(pi.name);
			if (autoload_path.begins_with("*")) {
				autoload_path = autoload_path.substr(1);
			}
			_export_find_dependencies(autoload_path, paths);
		}
	}