[#87160] Email Raw Export general reports as delayed jobs

I know this is going to take a hit in Code Climate because it extracts the CSV generation code out of the view, where it should notice it. I refactored it lightly this round. The view still exists as it was, but I think it may be dead code now. Tests fail if I remove it, but I don't think it needs to be there if the only "Export Raw" reports are general_reports.

This relied on @mlineen's PR #164 so it's included here. I can rebase it out if that it gets merged first.

I'd like to discuss how to handle running the delayed job queue.

There will be a separate PR for the NU fork.
Doing something like that might also make the PMU override a little easier, and you can avoid some of the duplication by using a template method here.