feat: Adds disable_progress_graph attribute to the returned course_metadata response

Currently, https://github.com/openedx/frontend-app-course-authoring/issues/517 faces an issue when the
progress graph toggle is enabled/disabled but the settings are not respected, the disable_progress_graph
attribute will allow the frontend-app-learning repo to use this attribute to respect the settings authored
from frontend-app-course-authoring and ultimately fix https://github.com/openedx/frontend-app-course-authoring/issues/517.

lms/djangoapps/course_home_api/progress/serializers.py

@@ -145,3 +145,4 @@ class ProgressTabSerializer(VerifiedModeSerializer):
     username = serializers.CharField()
     user_has_passing_grade = serializers.BooleanField()
     verification_data = VerificationDataSerializer()
+    disable_progress_graph = serializers.BooleanField()

lms/djangoapps/course_home_api/progress/views.py

@@ -230,6 +230,7 @@ class ProgressTabView(RetrieveAPIView):
 
         block = modulestore().get_course(course_key)
         grading_policy = block.grading_policy
+        disable_progress_graph = block.disable_progress_graph
         verification_status = IDVerificationService.user_status(student)
         verification_link = None
         if verification_status['status'] is None or verification_status['status'] == 'expired':
@@ -259,6 +260,7 @@ class ProgressTabView(RetrieveAPIView):
             'username': username,
             'user_has_passing_grade': user_has_passing_grade,
             'verification_data': verification_data,
+            'disable_progress_graph': disable_progress_graph,
         }
         context = self.get_serializer_context()
         context['staff_access'] = is_staff