Media: Cache parent posts in query-attachments AJAX endpoint.

Prime the parent post objects `wp_ajax_query_attachments()` to reduce the number of database queries in the query-attachments admin-ajax endpoint.

Props albatross10.
Fixes #56037.


Built from https://develop.svn.wordpress.org/trunk@53885


git-svn-id: http://core.svn.wordpress.org/trunk@53444 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/ajax-actions.php

@@ -3038,6 +3038,7 @@ function wp_ajax_query_attachments() {
 	 */
 	$query             = apply_filters( 'ajax_query_attachments_args', $query );
 	$attachments_query = new WP_Query( $query );
+	update_post_parent_caches( $attachments_query->posts );
 
 	$posts       = array_map( 'wp_prepare_attachment_for_js', $attachments_query->posts );
 	$posts       = array_filter( $posts );

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-53884';
+$wp_version = '6.1-alpha-53885';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.