Reports aren't handling 'in credit' orders accurately

[sstead]

Description

Reports aren't handling orders that are in credit well... as a start...

• The OC Customer Totals report shows ‘in credit’ orders as Not Paid.
• The OC payment Methods report isn’t very consistent in what amount it shows

Found while testing openfoodfoundation/openfoodnetwork#2273 ,
test notes https://docs.google.com/document/d/10lqelt6b0AEF6nhFSj0FII8ks8K3rv4beWZtcBfV_8M/edit#

Expected Behavior

I should be able to rely on reports to give accurate info.

Actual Behavior

Steps to Reproduce

1. Create an order and pay for it with Stripe.
2. Adjust the order so it becomes 'in credit'
3. Use the refund functionality to refund part of all of an order
4. See reports and check for accuracy of how refunded orders are handled.

Context

As a user i might want to refund stripe payments from OFN. This shouldn't impact on the accuracy of my reports.

Severity

s3

Your Environment

Chrome, PC, 1.18.0, Aus production

[kirstenalarsen]

This is connected to openfoodfoundation/openfoodnetwork#5208