Fix deletion throttling
Fix deletion throttling

Summary:
When backups were moved from 1am UTC to 8am UTC, the account deletion
logic's throttling wasn't correspondingly adjusted. This adjusts that.

Test Plan: TBD based on your input, likely rely on unit tests + staging on Monday

Reviewers: spang

Reviewed By: spang

Subscribers: ethanb, khamidou

Projects: #reliability

Differential Revision: https://phab.nylas.com/D2837

nylas/sync-engine,jobscore/sync-engine,nylas/sync-engine,jobscore/sync-engine,jobscore/sync-engine,closeio/nylas,jobscore/sync-engine,nylas/sync-engine,closeio/nylas,closeio/nylas,nylas/sync-engine,closeio/nylas