Refactor compliance dashboard into vue app

app/serializers/merge_request_serializer.rb

...ripts/compliance_dashboard/compliance_dashboard_bundle.js

...javascripts/compliance_dashboard/components/approvers.vue

...javascripts/compliance_dashboard/components/dashboard.vue

...vascripts/compliance_dashboard/components/empty_state.vue

...scripts/compliance_dashboard/components/merge_request.vue

...avascripts/compliance_dashboard/components/pagination.vue

ee/app/assets/javascripts/compliance_dashboard/constants.js

...ipts/pages/groups/security/compliance_dashboards/index.js

ee/app/assets/stylesheets/pages/compliance_dashboards.scss

...llers/groups/security/compliance_dashboards_controller.rb

ee/app/serializers/ee/merge_request_serializer.rb

ee/app/serializers/merge_request_compliance_entity.rb

...roups/security/compliance_dashboards/_approvers.html.haml

...ups/security/compliance_dashboards/_empty_state.html.haml

...s/security/compliance_dashboards/_merge_request.html.haml

.../security/compliance_dashboards/_merge_requests.html.haml

...iews/groups/security/compliance_dashboards/show.html.haml

...ec/features/groups/security/compliance_dashboards_spec.rb

..._dashboard/components/__snapshots__/approver_spec.js.snap