Improve the `@param` docs for `src/wp-includes/widgets.php`.

See #30224.

Built from https://develop.svn.wordpress.org/trunk@30665


git-svn-id: http://core.svn.wordpress.org/trunk@30655 1a063a9b-81f0-0310-95a4-ce76da25c4cd
Improve the `@param` docs for `src/wp-includes/user.php`.

See #30224.

Built from https://develop.svn.wordpress.org/trunk@30666


git-svn-id: http://core.svn.wordpress.org/trunk@30656 1a063a9b-81f0-0310-95a4-ce76da25c4cd