Apply changes on #3165828 and adjust param type in function comment.

This merge request is applying the changes on this patch file (https://www.drupal.org/files/issues/2024-01-04/sort_by_weight_3165828_7.patch), as well as fixing the param types in sortByWeight function comment.

Closes #3165828

src/Annotation/Preprocess.php

@@ -43,4 +43,13 @@ class Preprocess extends Plugin {
    */
   public $class = '';
 
+  /**
+   * The preprocess plugin weight.
+   *
+   * The weight of the plugin, the higher the number, the later the preprocess is being called.
+   *
+   * @var int
+   */
+  public $weight = 0;
+
 }