[SQLite] implement resetting Outbound P2P messages

Summary:
ENG-6982.

It is possible to do it as one query but will be more complicated and less readable, I can update if reviewers think it worth it.

Each query is described in code comments.

Test Plan: Tests

Reviewers: tomek

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D13028