Pass $reassign parameter to 'delete_user' and 'deleted_user' actions.

props genkisan.
fixes #23057.

git-svn-id: https://develop.svn.wordpress.org/trunk@27462 602fd350-edb4-49c9-b593-d223f7449a82
Fix docblock formatting in [27462]. see #23057.

git-svn-id: https://develop.svn.wordpress.org/trunk@27463 602fd350-edb4-49c9-b593-d223f7449a82