Update data for Payment APIs

[queengooborg]

When pulling data from the mdn-bcd-collector project I've been working on, I noticed a few odd discrepancies with data reported by the collector and BCD's data. It turns out that support for the Payment APIs is in more browsers than we initially thought. This PR does the following to fix these discrepancies, plus adjust our data in a desirable way:

1. Updates the data to reflect what was found based upon testing with the collector and manual testing (Opera, Opera Android, and Samsung Internet all support the APIs, apparently -- WebView has partial API support, though this is probably not intentional)
2. Removes repeated flag information for the API's subfeatures (we don't need to mention the flag for PaymentResponse.complete, for example, when PaymentResponse already has it)

The data for these interfaces was, to put it simply, quite the mess. This PR hopefully resolves the mess.

[foolip]

Removes repeated flag information for the API's subfeatures (we don't need to mention the flag for PaymentResponse.complete, for example, when PaymentResponse already has it)

This bit I'm not sure about. It seems to me like it will make the data incorrect, I'll comment inline.

[foolip]

Only reviewed part of it, have to run!

[foolip]

Aaaalmost ready to merge.