"[Product name] is out of stock and cannot be purchased" notice should not be dismissible

[Aljullu]

To reproduce

1. In the frontend, add a product to your cart.
2. In wp-admin, edit that product and set it out of stock.
3. Open a page with the Cart block or the Mini Cart drawer.
4. Notice a dismissible notice appears: "[Product name] is out of stock and cannot be purchased. Please remove it from your cart."

Expected behavior

The notice should not be dismissible, as the error persists until the product is removed from the cart. For reference, in the Cart shortcode the notice wasn't dismissible.

Screenshots

Cart block	Cart shortcode