Implement Multibanco at Order Details (My Account)

[gpressutto5]

Description

In #10013 we explored the required work to implement Multibanco as a new payment method. This issue focuses on implementing this new Payment method in the Order Details page.

The customer might need to check the payment instructions again so we should save them to the order. We can save the instructions and display them ourselves, or we can save the Voucher URL and rely on Stripe.

Acceptance criteria

• After placing an order with Multibanco, before the payment is complete, the user can go to the Order Details page, in My Account, and print the Payment Instructions again.

Additional context

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