This adds a new ManageViaMr component to the Security Configration page.
This component is for enabling a security feature via a merge request
via GraphQL.

This button is disabled by default behind the
sec_dependency_scanning_ui_enable feature flag.

Addresses https://gitlab.com/gitlab-org/gitlab/-/issues/325694 and
https://gitlab.com/gitlab-org/gitlab/-/issues/282533

.

Co-authored-by: Jannik Lehmann <jlehmann@gitlab.com>