Properly deprecate both constructors in `WP_User_Search`.

- `__construct()` gets the new `_deprecated_class()` function
- `WP_User_Search` PHP4 style constructor is changed from `_deprecated_function()` to `_deprecated_constructor()`

Adds a test to confirm `WP_User_Search` class is testable as deprecated.

Props jrf, DrewAPicture.
Fixes #41125.

Built from https://develop.svn.wordpress.org/trunk@56469


git-svn-id: http://core.svn.wordpress.org/trunk@55981 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/includes/deprecated.php

@@ -493,7 +493,7 @@ class WP_User_Search {
 	 * @return WP_User_Search
 	 */
 	function __construct( $search_term = '', $page = '', $role = '' ) {
-		_deprecated_function( __FUNCTION__, '3.1.0', 'WP_User_Query' );
+		_deprecated_class( 'WP_User_Search', '3.1.0', 'WP_User_Query' );
 
 		$this->search_term = wp_unslash( $search_term );
 		$this->raw_page = ( '' == $page ) ? false : (int) $page;
@@ -516,6 +516,7 @@ class WP_User_Search {
 	 * @return WP_User_Search
 	 */
 	public function WP_User_Search( $search_term = '', $page = '', $role = '' ) {
+		_deprecated_constructor( 'WP_User_Search', '3.1.0', get_class( $this ) );
 		self::__construct( $search_term, $page, $role );
 	}
 

wp-includes/version.php

@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.4-alpha-56468';
+$wp_version = '6.4-alpha-56469';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.