Add MR approval status column to the compliance dashboard

What does this MR do?

This MR will close off #217939 (closed) and display the approval status from !36824 (merged) on the compliance dashboard.

The MR adds a new column to the dashboard and a new ApprovalStatus component which functions in a similar fashion to the existing PipelineStatus component.

The checks are:

• MR authors are not allowed to approve MRs
• MR committers are not allowed to approve MRs
• The number of required approvers is >= 2

Status	Icon	Description
[empty]		The Merge Request approval status is unknown
failed		The Merge Request does not comply with any of the above criteria
warning		The Merge Request complies with some of the above criteria
success		The Merge Request complies with all of the above criteria

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

1. Navigate to groups/[GROUP]/-/security/compliance_dashboard
2. Create and merge MR's for different projects; which pass or fail the checks listed above
3. Check that the correct icon is displayed for each, with the correct tooltip and the icon links to the separation of duties documentation

• 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

Related #217939 (closed)