Reinstate the default role for course creators (revert logic changes from MDL-66181)

Go to " Site administration / Users / Permissions / Define roles " Press " Add a new role " On the " Adding a new role " page, make sure that "Use role or archetype" is set to " No role " Give the role a short name and custom full name. In "Context types where this role may be assigned" select System to be able to assign this role in the system context. Set the following settings: Context types where this role may be assigned System Capabilities moodle/course:create moodle/course:manageactivities moodle/course:viewparticipants Create the role. Go to " Site administration / Users / Permissions / Assign system roles" Click on the new role that you created. Assign a user to that role. On another browser session, log in as that user Create a course (you can add a new course via the " Site home " with editing mode turned on. View the participants page Expected result: Confirm that you are listed Expected result: Confirm that you are given the teacher role Back on the admin's window, edit the new role that you created. For the new role created, set the " Allow role assignments " field to " Teacher " Save the changes. Go back to the user's window and create another course View the participants page Expected result: Confirm that you are listed Expected result: Confirm that you are given the teacher role Back on the admin's window, edit the new role that you created. Set the capability 'moodle/role:assign' to allow. Back on the user's window, create another course View the participants page Expected result: Confirm that you are listed Expected result: Confirm that you are given the teacher role