PROTOTYPE: Remove search bar from TreePage and replace with button

Created by: christinaforney

To make sure we can provide a consistent experience with the search bar, we are going to get rid of the in-page search bar for page trees and blobs. To keep the local search functionality, we will change the in-page search bar to be a button instead, which will populate the search bar with the proper query parameters.

This prototype just redirects to a search page, and populates the appropriate relative filters. The next step will be to make this add the query to the top search bar, and add focus, without the redirection.