Co-authored-by: Sujith Haridasan <sujith@moodle.com>

This reverts commits c1468388,
c1468388 and
9a900492.

This commit also remove some deprecated table properties as well.

Replace steps that manually add assignment instances via the UI
and use Behat generators. This improves the speed of Behat test
runs.

This change is to stop there being a possibility of 2 digests tasks
being created for a user on the day that MDL-72767 is applied.

Before this change if a new post was made after the digest time but
before todays daily digest had been sent the run time on the digest
would be set to the next day resulting in no digest being sent to
the user.

By adding the server midnight to the custom data on the task we
ensure that in this case a new adhoc task is created for the next
day leaving the current one to get processed.

Server midnight is used so that if the digest time setting is
changed we would not get two tasks queued for the same day.

It's good to keep the test because it's not easy to
reproduce the issue to be fixed. Part of the fix will
be to remove this skip.

Ideally any new test should be using a class name matching
the file name, and to use namespace when clearly belonging to
a component (sub-namespace also allowed for better accuracy).

And, also, adding a @covers label to indicate which class
(preferred, method is also possible) is being covered with the test.

This also implements the functionality for SCORM packages, which may
have SVG images embedded within their content which require loading
directly (and are only created by users with appropriate risk flag).

- Update the behat tests to more precisely check the state in the completion report.
- Check combination of completion conditions with passing grade

- Reverts the custom flow logic introduced in the 52206
- Expand unit tests to cover different grade based completion settings