Media: Restore usage of attachment filters in media modal.

[61757] wrapped the media attachment filters, which changed the return value of toolbar filters from `AttachmentFilters` to a `wp.media.View` instance, breaking the API to customize media library filters.

Reverts the shape change in the attachment filter return value and implements CSS based positioning for the visible labels.

Props bernhard-reiter, joedolson, ozgursar, audrasjb, darshitrajyaguru97, jorbin.
Fixes #64948.

git-svn-id: https://develop.svn.wordpress.org/trunk@62326 602fd350-edb4-49c9-b593-d223f7449a82