[web] Replace threadInChatList with useThreadsInChatList in SidebarsModal

Summary:
Part of replacing threadInChatList with useThread[s]InChatList hooks, which in turn is part of replacing threadHasPermission with the useThreadHasPermission hook.

Depends on D11950

Test Plan:
flow + close reading

Add log statements to SidebarsModal on web and ensure that threadInChatList and useThreadsInChatList return same results.

Reviewers: ashoat, ginsu, tomek, varun

Reviewed By: ashoat

Differential Revision: https://phab.comm.dev/D11980