[native] [refactor] [ENG-991] use usePromoteSidebar hook
Summary:
use hook in native, remove old code
https://linear.app/comm/issue/ENG-991/promote-sidebar-to-subthread-on-web
Test Plan: use promote thread feature like you normally would.
Reviewers: atul, def-au1t, palys-swm
Reviewed By: palys-swm
Subscribers: ashoat, palys-swm, Adrian, karol-bisztyga, yayabosh
Differential Revision: https://phabricator.ashoat.com/D3748