[web] make user profile accessible from message reactions list item

Summary:
This diff makes the message reactions list item interactive. When a user clicks on this component, the user profile modal will be pushed

Linear Task: https://linear.app/comm/issue/ENG-5244/make-user-profile-accessible-from-message-reactions-modal

Depends on D9485

Test Plan:
Please see the demo video below

Reviewers: atul, inka

Reviewed By: atul

Subscribers: ted, ashoat, tomek, wyilio

Differential Revision: https://phab.comm.dev/D9486