Refactor Soft Delete Specs

Just for more discussion

This one was much harder. There's a few inline comments I want to make for discussion, but I'd also like input on what's left in https://github.com/OregonDigital/oregondigital/blob/feature/TrySoftDeleteSpecs/spec/features/soft_delete_spec.rb , which is primarily "display things that are queried". Any thoughts on how to pull that out? Or is this just the only way to avoid mucking about in Blacklight stuff?
Is this the wrong test? Should I be stubbing out ability checking rather than making them an admin, then add tests to Ability?