[lib] Refactor actions in activity-actions.js

Summary: issue: https://linear.app/comm/issue/ENG-4681/create-action-objects-for-all-actions

Test Plan: Tested that the actions work as expected

Reviewers: michal, kamil, ginsu

Reviewed By: michal

Subscribers: ashoat, tomek, wyilio

Differential Revision: https://phab.comm.dev/D9353