[native] Move DeleteThread logic for determining ThreadInfo to hook

Summary:
This mirrors the same migration that we did for this logic in ThreadSettings.

Depends on D6594

Test Plan: Flow, code inspection / comparison to ThreadSettings code. Also tested in combination with following diffs

Reviewers: atul

Reviewed By: atul

Subscribers: tomek

Differential Revision: https://phab.comm.dev/D6595