[4.x] Auto retry requests where the cart has expired

[Jade-GG]

ref: RAP-1854, BORDEX-1358

Currently, when your cart expires you will sometimes get an ugly and scary error telling you your cart ID is not valid.

With this PR, I check for this error and underwater we retry the request once, adding a more friendly notification telling you that your cart has expired in the meantime. This means that, for example, if you add a product to your expired cart, it will make a new cart and then re-add the product to this new cart.

This makes the user experience for expired carts a bit nicer.

[Jade-GG]

Unfortunately some requests have cartId and others have cart_id. This was the simplest and most readable way to catch both.

[indykoning]

Code wise it's looking good.
But perhaps we can simplify it a lot by doing what we are doing in the useUser store:

core/resources/js/stores/useUser.js

Line 214 in 08c16ce

window.setTimeout(() => refresh(), 200)

I reckon refreshing the cart after loading the page will tackle most of the problems users experience.