Deprecate core_course\output\activity_information class and move its code to two
new classes: core_course\output\activity_completion and core_course\output\activity_dates.
In this process refactor activity_completion improving readability and and also deprecate
renderer_base::activity_information() and core_course_renderer::render_activity_information().
We should complete the deletion process using the same
user that started it.
Added a new param to loginas() to prevent the event to be generated as
there is no need to generate an new event for that as the user didn't
explicitly loginas again.