Add Unresolved discussions merge check state

What does this MR do and why?

Implements Add actions to MR Merge Check failed list for: ... (#425338 - closed)

Screenshots or screen recordings

Before	After

How to set up and validate locally

• Run bin/rake frontend:fixtures
• Install storybook yarn storybook:install
• Build storybook yarn storybook:start
• Visit http://localhost:9002/?path=/story/vue-merge-request-widget-merge-checks--default

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.