Add Dependency List actions component

What does this MR do?

This adds the component that allows the user to change the sorting behaviour of the dependency list, and also download a JSON export of the full list. It's part of the Dependency List MVC. It's one of a handful of MRs that will make up the frontend portion of the feature.

This MR must be merged after !13674 (merged) has been merged, since that implements the Vuex store which this component relies upon.

This should satisfy the relevant requirements listed in #10075 (closed), #11059 (closed) and #11397 (closed).

Does this MR meet the acceptance criteria?

Conformity

• [-] Changelog entry
• [-] Documentation created/updated or follow-up review issue created
• Code review guidelines
• [-] Style guides
• Separation of EE specific content

Performance and testing

• Review and add/update tests for this feature/bug. Consider all test levels. See the Test Planning Process.
• [-] Tested in all supported browsers