Resolve #3030154: layout_builder__layout_section column hitting database limit

Closes #3030154

core/modules/layout_builder/src/Plugin/Field/FieldType/LayoutSectionItem.php

@@ -68,7 +68,7 @@ public static function schema(FieldStorageDefinitionInterface $field_definition)
       'columns' => [
         'section' => [
           'type' => 'blob',
-          'size' => 'normal',
+          'size' => 'big',
           'serialize' => TRUE,
         ],
       ],