Revert the final keywords for dataset methods (#1499)

Remove the final keyword, as the signature change breaks existing code.

plugins/manager/lib/yform/manager/dataset.php

@@ -743,7 +743,7 @@ private static function tableToModel(string $table): string
     /**
      * @internal
      */
-    final protected static function modelToTable(): string
+    protected static function modelToTable(): string
     {
         $class = static::class;