[native][web] Fetch related messages for search

Summary: issue: ENG-8783

Test Plan:
Tested by commenting out isThreadThin check, and commenting out extractKeyserverIDFromIDOptional(messageInfo.threadID) check in getMessageSearchStoreOps, and setting threadMessageInfos in createChatMessageItems to empty array to make sure messages from redux are not being used.. This allowed me to treat a thin thread as if it were thick, and execute local search on it.

Tested that edits and reactions show up in search results

Reviewers: tomek, kamil

Reviewed By: tomek

Subscribers: ashoat

Differential Revision: https://phab.comm.dev/D12867