The existing course format plugins are not adapted tu use the new
courseformat subsystem. This means they don't provide a valid renderer,
or hardcode the inclusion of the topics renderer.php file, or do not
extend the format renderer but the core one (missing some methods). This
commit provides some quick fixes to prevent exceptions.

Fixing regression caused by MDL-71795.

Refactor rendering classes to be more PSR compliant.

Move renderer to output class folder and initial
splitting of classes in renderable.php into individual
class files. To make it easier to refactor assign UI
functionality in the future.

This also improves the noevents string so it makes sense in all
contexts.

Assign view UI style change.

Style submission status and grading summary tables
to have matched visual styles.

Co-authored-by: Huong Nguyen <huongnv13@gmail.com>