Allow special access to bulk management tools (#165)

Access is configured on a per-course-run basis
via the new setting:
`BULK_MANAGEMENT_SPECIAL_ACCESS_COURSE_IDS`

TNL-7901

src/data/selectors/special.js

@@ -0,0 +1,12 @@
+// Certain course runs may be expressly allowed to view the
+// bulk management tools, bypassing the other checks.
+// Note that this does not affect whether or not the backend
+// LMS API will permit usage of the tool.
+
+const hasSpecialBulkManagementAccess = courseId => {
+  const specialIdList = process.env.BULK_MANAGEMENT_SPECIAL_ACCESS_COURSE_IDS || '';
+  return specialIdList.split(',').includes(courseId);
+};
+
+export { hasSpecialBulkManagementAccess };
+export default hasSpecialBulkManagementAccess;