Release testing instructions for WC Payments 8.9.0

Persist reporting table column visibility in user preferences

Ideally, this test should be done after all critical tests so that there will be multiple types of payment methods.

Open the following reporting list views
- Payments → Transactions
- Payments → Disputes
- Payments → Payouts
For each, click the three-dot menu in the top-right of the table.
Toggle on/off some columns.
Ensure these changes persist between browser sessions (e.g. login to WP-admin with another incognito mode tab).