[License Compliance Widget Extension] - Frontend - Implement uncollapsable state by consuming MR widget extension API

Implement for License Compliance MR widget extension the ability to show an uncollapsible state

Current Implementation

Desired

Same design without the chevron when we have no new licenses.

Implementation Plan

Based off the implementation in !83205 (merged)

Implement a function like:

1. In: ee/app/assets/javascripts/vue_merge_request_widget/extensions/metrics/index.js

shouldCollapse(){
 return this.newLicenses() > 0
}

1. Update unit tests