Reference: https://github.com/mongodb/mongo/blob/master/src/mongo/db/s/README_sessions_and_transactions.md#periodic-cleanup-of-the-session-catalog-and-transactions-table

In https://jira.mongodb.org/browse/SERVER-94001, we had a comment suggesting that we revisit the design of this component. That ticket has been closed as we have made a tactical fix to remediate the issue of the ticket, however, we may still want to revisit the design of this component as a whole, as the local in-memory view of active sessions that is periodically synced with a persistent sessions collection is potentially error-prone model. We may be able to design a better architecture.