[#13304] Refactoring for Unit Test Access Controls

[zedonggg]

Part of #13304

The following tests in sqlui/webapi have been refactored to follow the new access control methods within the testAccessControl method:

• StudentSearchIndexingWorkerActionTest
• UnpublishFeedbackSessionActionTest
• UpdateCourseActionTest
• UpdateFeedbackQuestionActionTest
• UpdateFeedbackSessionLogsActionTest
• UpdateInstructorActionTest
• UpdateInstructorPrivilegeActionTest
• UpdateNotificationActionTest
• UpdateStudentActionTest