Allow current results on Test Queue page to be publicly viewed

[howard-e]

A main purpose of this project is to easily present results and relevant data to visitors on how assistive technologies behave today. This use case is served by the reports page which displays "finalized" results. These results have been fully reviewed and then presented following the test result collection process. This page is available to all users regardless of their "logged in" status.

However, if one were curious of how the current results being collected on the Test Queue looks for individual testers, only the admin can view that. Another tester can only view their runs, and only have an idea of another's if they force a conflict between their results. A non signed in user can view the Test Queue, the testers that are assigned and also the number of tests they have completed but they do not have the option to view the testers' results.

This came up during a recent discussion with @mcking65 while discussing if conflicts should be visible to all visitors in #1195. The current proposal is to do the following:

1. Signed out user:
   1. In the actions column on the Test Queue page, if there are testers assigned, add a "View Results for ..." button which opens a menu of the assigned testers (this is similar to the admin's "Open run as ..." functionality).
   2. Selecting an option open's the tester's run with all their results populated on each test's form page, in a read-only mode.
2. Signed in user (not admin):
   1. In the actions column on the Test Queue page, if there are testers assigned which are not the currently signed in user, add a "View Results for ..." button which opens a menu of the assigned testers (this is similar to the admin's "Open run as ..." functionality).
   2. Selecting an option open's the tester's run with all their results populated on each test's form page, in a read-only mode.