'Review next merge request' panel
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## Proposal
Consider putting the next review into the review panel to help encourage the flow from submitting a review to the next review.
Note: This should be treated as an iteration/experiment of https://gitlab.com/gitlab-org/gitlab/-/issues/457731
## Details
A drawer appears with a list of merge requests reviews to select from. See https://gitlab.com/gitlab-org/gitlab/-/issues/457731#note_2395782806
| Select a merge request to review | No more reviews scenario |
| ------ | ------ |
|  |  |
issue