Show number of approvals still required in the merge request list

Description

Trying to determine number of approvals still required for a given merge request.

Proposal

Where all merge requests are listed, either a) show how many approvals still required (e.g., 1/2 approvals) or b) show approval counts (1 approval).

Links / references

Documentation blurb

Overview

When looking at a list of merge requests, it is nice to know how many more approvals are required.

Use cases

Who is this for? Provide one or more use cases.

Feature checklist

Make sure these are completed before closing the issue, with a link to the relevant commit.

• Feature assurance
• Documentation
• Added to features.yml