Implemented recommended efficiency enhancement

Deferred reading the file till after determining if it was
the file to be filtered, so that the file wasn't read twice
per the review comments.

editor/export/editor_export_platform.cpp

@@ -1495,12 +1495,14 @@ Error EditorExportPlatform::export_project_files(const Ref<EditorExportPreset> &
 
 	Vector<String> forced_export = get_forced_export_files();
 	for (int i = 0; i < forced_export.size(); i++) {
-		Vector<uint8_t> array = FileAccess::get_file_as_bytes(forced_export[i]);
+		Vector<uint8_t> array;
 		if (GDExtension::get_extension_list_config_file() == forced_export[i]) {
 			array = _filter_extension_list_config_file(forced_export[i], paths);
 			if (array.size() == 0) {
 				continue;
 			}
+		} else {
+			array = FileAccess::get_file_as_bytes(forced_export[i]);
 		}
 		err = p_save_func(p_udata, forced_export[i], array, idx, total, enc_in_filters, enc_ex_filters, key, seed);
 		if (err != OK) {