* query.date_range is now in UTC instead of user timezone
This simplifies things down the line and fixes several bugs where
query.date_range is cast to naivedatetime for ecto purposes
Many places still remain broken:
- comparison queries
- `to_date_range` calls
* Make default_for_date_range not care about time zones
* Make timezone parameter mandatory for to_date_range
* Simplify utc_date_range, update legacy query builder
* Fix more cases where query date range is needed
* query.date_range -> query.utc_time_range
* Query.date_range/1 function
* ensure_include_imported update
* Clean up send_email_report