[native] Add utils for migrating message store

Summary:
https://linear.app/comm/issue/ENG-3995/create-functions-for-migrating-the-client-stores
Based on updateClientDBThreadStoreThreadInfos and previous migrations, I've added updateClientDBMessageStoreMessages and updateClientDBMessageStoreThreads.

Depends on D8355

Test Plan: Tested using the id schema migration introduced in the next diff in stack. Checked if the migration run correctly

Reviewers: kamil, tomek

Reviewed By: kamil

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D8384