R1:4fcb38a2a94c

Move the Auth Provider edit flow toward a more modern layout

Summary:
Depends on D20095. Ref T13244. Currently, auth providers have a list item view and a single gigantic edit screen complete with a timeline, piles of instructions, supplemental information, etc.

As a step toward making this stuff easier to use and more modern, give them a separate view UI with normal actions, similar to basically every other type of object. Move the timeline and "Disable/Enable" to the view page (from the edit page and…