Restore fuction of updated_at timestamp in Message Review conversations

[kohlee]

Describe the bug
Users report that the "Last updated at" column within message review reflects the current user's local time rather than message_status.updated_at

To Reproduce
Steps to reproduce the behavior:

1. Go to Message Review
2. View "Last updated at" column
3. See your own local time as the timestamp for all conversations

Expected behavior
"Last updated at" should be the timestamp of changes to message status (e.g. needsMessage to messaged, messaged to needsResponse)

Screenshots

Screenshot time: 10:14am on May 19

First listed conversation's timestamp: 1 month ago