Add usages of `wp_admin_notice()` and `wp_get_admin_notice()` on `.notice-[type]` in the root level of `/wp-includes/`. Ongoing task to implement new function across core.
Props costdev, joedolson.
See #57791.
git-svn-id: https://develop.svn.wordpress.org/trunk@56572 602fd350-edb4-49c9-b593-d223f7449a82