Admin reports

QA is happening as part of code review.

Indicator definitions: https://docs.google.com/a/dimagi.com/spreadsheets/d/1Ug09IcbogB9JyCIGS2vHV0kRTn2U_zO-Y9HRAinOpT0/edit#gid=1495052602

@emord @czue @esoergel 
do all of these return something that is structured the same way? possibly the output format of `format_return_data`? 

If so, it might be nice to make that an `AdminReportResult` class or something so it's obvious what the expected schema and how you interact with it are. 

if not, that's a bit confusing since that would couple the caller with the inner function.