Move create class student to before block

Author: jamiebenstead

spec/features/lesson/listing_lessons_spec.rb

@@ -6,6 +6,7 @@
   before do
     authenticated_in_hydra_as(owner)
     stub_user_info_api_for(teacher)
+    create(:class_student, school_class:, student_id: student.id)
   end
 
   let(:headers) { { Authorization: UserProfileMock::TOKEN } }
@@ -199,10 +200,6 @@
     let!(:lesson) { create(:lesson, school_class:, name: 'Test Lesson', visibility: 'students', user_id: teacher.id) }
     let(:teacher) { create(:teacher, school:) }
 
-    let!(:class_student) do
-      create(:class_student, school_class:, student_id: student.id)
-    end
-
     let(:student_project) do
       create(
         :project,