Keep approval state up-to-date in MR dashboard

Issue

From #512314 (comment 2294975855)

This MR has been approved by @lwanko but it's not showing the approved state on my dashboard. Might have something to do with the fact that he removed himself as reviewer, then re-assigned himself after already approving 🤷

MR sidebar Dashboard view
Screenshot_2025-01-13_at_2.21.00_PM Screenshot_2025-01-13_at_2.24.14_PM

Proposal

Keep approval status up-to-date on MR dashboard, regardless of review request status.

From @iamphill:

I think we could check if the reviewer getting assigned has approved and restore the state 🤔