Resolve "Work items list - use thumbsup and thumbsdown"

What does this MR do and why?

This MR adds the up/down vote UI elements on the work items and epics list page when some flags are enabled for parity with the /epics route unflagged. Each work item should have it visible, if the work item received any votes, beside the assignee icon.

MR acceptance checklist

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Screenshots or screen recordings

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/work_items route

Before	After

/epics route

Before	After

How to set up and validate locally

1. Enable the flags work_item_epics_list, work_item_epics, work_item_epics_rollout, and namespace_level_work_items
2. Go to the /work_items page (for example: http://localhost:3000/groups/flightjs/-/work_items)
3. Like or dislike any work item on their detail page
4. Go back to the /work_items page
5. Expect to see the up/down vote emojis on the right side of the work item
6. Repeat the same steps for the /epics route and expect the same behavior, but now showing only the epics work item type (for example: http://localhost:3000/groups/flightjs/-/epics)

Related to #476158 (closed)