Add filter UI-component to group-level dependencies app

Why are we doing this work

In separate issues, we will add the displaying of license data and sorting by license-name. This issue captures the work that is needed to lay the ground for adding multiple filter-options to the table.

Implementation plan

• Add styling to group-level to add layout of filters next to the current actions (sort- and export buttons) - this should not affect the project-level app
• Add a component that contains all group-level related filtering functionality
• Render the component on the group-level app only
• Make sure that the changes are behind the group_level_licenses feature flag
• Add specs