Add a reporting table for projects

[bickelj]

Fixes #4050

What a small line for such a large set of changes. Those supporting changes include:

• Creating a view for the new Reporting Table
• Creating a current_report() method in report_config that is slightly differnt than current_report_due (see inline doc)
• Adding a ProjectQuerySet method that does some intense subquerying to be able to express the current_report in sql so that the status can be filtered against

Note from the cherry-picker/integrator

I see that the summary tables for reports was removed from apply/projects and that the current dropdown in the main navigation header points to apply/project/reports. This new table appears under apply/project/reporting and is linked to in the original fork in which this change occurred. As for integration here, the question is: do we want to replace the original table or augment off to the side somehow? Where should the link to this new table live?

Test Steps

URL is apply/projects/reporting.

• [ ] Get a project to the reporting phase, and it should show up in the table
• [ ] Filter the table by not started and make sure it shows up
• [ ] Set the project's report due to various kinds, and the report due date in table should change correspondingly
• [ ] Save a report as a draft, which should move it to in progress on the table
• [ ] Filter the table by in progress to make sure it shows up!
• [ ] Complete the report, which should move it to submitted status on the table
• [ ] Filter the table by submitted to make sure it shows up.

[bickelj]

@frjo Is this one ready for merge?