Part 2: Add reviewers to side widget (Vue Components)

Issue: #237921 (closed)

What does this MR do?

This MR adds the Vue components, so there is the reviewers selection in the sidebar.

MR	Changes
!40488 (merged)	Add reviewers to MR form (BE)
!40330 (merged)	Add reviewers to MR form (FE)
!40424 (merged)	Part 1: Add reviewers to Sidebar -- Setup (HAML + JS)
👉 this MR	Part 2: Add reviewers to Sidebar -- Vue related (mount, components, spec)

Note

This is the first iteration. For simplicity, we are just copying the implementation of the "Assignees" dropdown. As this will be overhauled and replaced in the next iteration > #233736 (closed)

Testing Case

This feature is behind a feature flag, to turn on:

rails c

Feature.enable(:merge_request_reviewers)

1. Go to a Merge Request
2. Make sure the sidebar is non-collapsed

• There is a Reviewer selection

3. Select a reviewer

• The saved reviewer(s) will appear

Reviewer	Reviewers

Screenshots

Does this MR meet the acceptance criteria?

Conformity

• Changelog entry
• Documentation (if required)
• Code review guidelines
• Merge request performance guidelines
• Style guides
• Database guides
• Separation of EE specific content

Availability and Testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• Tested in all supported browsers
• Informed Infrastructure department of a default or new setting change, if applicable per definition of done

Security

If this MR contains changes to processing or storing of credentials or tokens, authorization and authentication methods and other items described in the security review guidelines:

• Label as security and @ mention @gitlab-com/gl-security/appsec
• The MR includes necessary changes to maintain consistency between UI, API, email, or other methods
• Security reports checked/validated by a reviewer from the AppSec team

Closes #237921 (closed)

Closes #237921 (closed)