[web] cleanup and better organize code for tooltips

Summary:
Move diff. As I have been working with the tooltip code recenlty I've noted that the tooltip code is all over the place and is not organized well. I wanted to take a moment to "clean up" the neighborhood and put all the tooltip code into a singular place

Depends on D10473

Test Plan: flow and confirmed that all the tooltips (message action, reaction, and label) had no regressions

Reviewers: atul, kamil, rohan

Reviewed By: atul

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D10474