REST API: Add 'delete_widget' action to delete widget endpoint

Triggers the 'delete_widget' action to the delete widget endpoint in the REST
API. This aligns with the behaviour in the widgets WP Admin screen.

Fixes #53289.
Props isabel_brison, TimothyBlynJacobs.

Built from https://develop.svn.wordpress.org/trunk@51060


git-svn-id: http://core.svn.wordpress.org/trunk@50669 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/rest-api/endpoints/class-wp-rest-widgets-controller.php

@@ -321,6 +321,9 @@ class WP_REST_Widgets_Controller extends WP_REST_Controller {
 			);
 			$_REQUEST = $_POST;
 
+			/** This action is documented in wp-admin/widgets-form.php */
+			do_action( 'delete_widget', $widget_id, $sidebar_id, $id_base );
+
 			$callback = $wp_registered_widget_updates[ $id_base ]['callback'];
 			$params   = $wp_registered_widget_updates[ $id_base ]['params'];
 

wp-includes/version.php

@@ -13,7 +13,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '5.8-alpha-51059';
+$wp_version = '5.8-alpha-51060';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.