Jira: https://storjlabs.atlassian.net/browse/USR-822
The balance history in Satellite GUI display the deposit bonuses as
separate rows. These bonuses used to be stored in the satellite DB. We
recently started depositing the bonus directly to the Stripe balance and
migrated old bonuses to Stripe metadata.
This change displays all billing history entirely from Stripe, so we can
remove the `credits` and `credits_spendings` DB tables in a next step.
Change-Id: I14c304c66ec47c6a51f5b8508f11470cf36c4e24
4bcf308a04