Display invalid approvals on merge request widget

What does this MR do and why?

Display invalid approvals on merge request widget.

Invalid will be applied to MRs:

• when the author is the only eligible approver.
• when there is no eligible approver assigned to the rule.

Related issue: #334698 (closed)

Backend related MR: !87596 (merged)

Documentation related MR: !88943 (merged)

Screenshots or screen recordings

CE

EE (user who is an approver)

EE (user who is not an approver)

Updated with fix for Learn more and .

How to set up and validate locally

1. Create a security project as described in the docs
2. Create a new scan result policy with the project owner
3. [Scenario 1] Assign either an invalid user or group as approvers.
4. [Scenario 2] Assign approver to be the same as the MR author.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• I have evaluated the MR acceptance checklist for this MR.