[native] Move methods from Tooltip to functional compononent

Summary:
Move getTooltipItem, onPressMore, renderMoreIcon and onTooltipContainerLayout to the functional compoent as a part of Tooltip migration to functional component.

Depends on D14110

Test Plan:
Open up some tooltips and verify they're looking correctly.
Open text message tooltip and press More, verify it works.

Reviewers: ashoat, tomek

Reviewed By: ashoat

Differential Revision: https://phab.comm.dev/D14111