Wildcard: `Listbox` migration

Created by: valerybugakov

Context

To support use cases non covered by the Menu component, we need to implement the Listbox component in the Wildcard component library.

SearchContextOwnerDropdown should be migrated to a new component built on top of the Listbox component. The menu component is not the right tool for the job.

Implementation

1. Wait for https://github.com/sourcegraph/sourcegraph/issues/35689 to be completed
2. Migrate components matching the Listbox implementation in the codebase.