Description (*)

This matching the existing frontend checkout flow and allows capturing
additional information for fraud tools such as Kount when placing orders.

Fixed Issues (if relevant)

1. [Checkout] Set Payment Method and Place Order Mutation #716

Manual testing scenarios (*)

1. Create empty cart
2. Add product to cart
3. Set billing address (and shipping if cart is not virtual)
4. Set shipping method (if cart is not virtual)
5. Set payment method and place order via mutation

mutation setPaymentMethodAndPlaceOrder($cartId:String!, $methodCode:String!) {
  setPaymentMethodAndPlaceOrder(input: {
      cart_id: $cartId
      payment_method: {
          code: $methodCode
      }
  }) {    
    order {
      order_id
    }
  }
}

Contribution checklist (*)

• Pull request has a meaningful description of its purpose
• All commits are accompanied by meaningful commit messages
• All new or changed code is covered with unit/integration tests (if applicable)
• All automated tests passed successfully (all builds are green)