[native] Rename the lib directory to third-party

Summary:
Renamed the directory using git mv and changed paths in the
codebase from lib/sqlite_orm to third-party/sqlite_orm

Test Plan:
Restarted the keyserver and native with yarn dev both
before and after the changes, and both run successfully.

Reviewers: atul, ashoat, ginsu, jon

Reviewed By: atul

Subscribers: ashoat, tomek, abosh

Differential Revision: https://phab.comm.dev/D5303