[MR Widget V2]: Display the Security Reports content using widget components

Summary

Display the content part of the MR Security Widget:

Implementation plan

• frontend Use the newly created widget components to display the MR Security Widget Content: https://gitlab.com/gitlab-org/gitlab/-/tree/master/app/assets/javascripts/vue_merge_request_widget/components/widget. Instead of relying on dynamic data, we want to use the <slot> approach that the widget offers because we have more custom content compared to other widgets.