[native] Displaying 'Edit' labels next to edited messages

Summary: Added displaying 'Edit' label next to edited messages.

Test Plan:
message not edited and without thread/reactions,
message edited without thread/reactions,
message not edited with thread/reactions,
message edited with thread,
message edited with reactions,
message edited with thread and reactions,
many edited messages in a row,

Screenshots:

Made sure on iOS that no Message height warnings are displayed in the console.

Reviewers: michal, inka, ginsu

Reviewed By: inka

Subscribers: ashoat, tomek, atul

Differential Revision: https://phab.comm.dev/D7066