feat!: drop legacy course home view and related code

This was the "outline tab" view of the course. Preceded by the
course info view, succeeded by the MFE outline tab.

In addition to the course home view itself, this drops related
features:
- Legacy version of Course Goals (MFE has a newer implementation)
- Course home in-course search (MFE has no search)

The old course info view and course about views survive for now.

This also drops a few now-unused feature toggles:
- course_experience.latest_update
- course_experience.show_upgrade_msg_on_course_home
- course_experience.upgrade_deadline_message
- course_home.course_home_use_legacy_frontend

With this change, just the progress and courseware tabs are still
supported in legacy form, if you opt-in with waffle flags. The
outline and dates tabs are offered only by the MFE.

AA-798

(This is identical to previous commit be5c1a6, just reintroduced
now that the e2e tests have been fixed)

openedx/features/course_experience/tests/views/test_masquerade.py

@@ -2,10 +2,12 @@
 Tests for masquerading functionality on course_experience
 """
 
+from django.urls import reverse
+
 from edx_toggles.toggles.testutils import override_waffle_flag
-from lms.djangoapps.course_home_api.toggles import COURSE_HOME_USE_LEGACY_FRONTEND
 from lms.djangoapps.courseware.tests.helpers import MasqueradeMixin
-from openedx.features.course_experience import DISPLAY_COURSE_SOCK_FLAG, SHOW_UPGRADE_MSG_ON_COURSE_HOME
+from lms.djangoapps.courseware.toggles import COURSEWARE_USE_LEGACY_FRONTEND
+from openedx.features.course_experience import DISPLAY_COURSE_SOCK_FLAG
 from common.djangoapps.student.roles import CourseStaffRole
 from common.djangoapps.student.tests.factories import CourseEnrollmentFactory, UserFactory
 from xmodule.modulestore.tests.django_utils import SharedModuleStoreTestCase  # lint-amnesty, pylint: disable=wrong-import-order
@@ -14,11 +16,9 @@ from xmodule.partitions.partitions import ENROLLMENT_TRACK_PARTITION_ID  # lint-
 from xmodule.partitions.partitions_service import PartitionService  # lint-amnesty, pylint: disable=wrong-import-order
 
 from .helpers import add_course_mode
-from .test_course_home import course_home_url
 from .test_course_sock import TEST_VERIFICATION_SOCK_LOCATOR
 
 TEST_PASSWORD = 'test'
-UPGRADE_MESSAGE_CONTAINER = 'section-upgrade'
 
 
 class MasqueradeTestBase(SharedModuleStoreTestCase, MasqueradeMixin):
@@ -67,17 +67,15 @@ class TestVerifiedUpgradesWithMasquerade(MasqueradeTestBase):
     Tests for the course verification upgrade messages while the user is being masqueraded.
     """
 
-    @override_waffle_flag(COURSE_HOME_USE_LEGACY_FRONTEND, active=True)
+    @override_waffle_flag(COURSEWARE_USE_LEGACY_FRONTEND, active=True)
     @override_waffle_flag(DISPLAY_COURSE_SOCK_FLAG, active=True)
-    @override_waffle_flag(SHOW_UPGRADE_MSG_ON_COURSE_HOME, active=True)
     def test_masquerade_as_student(self):
         # Elevate the staff user to be student
         self.update_masquerade(course=self.verified_course, user_partition_id=ENROLLMENT_TRACK_PARTITION_ID)
-        response = self.client.get(course_home_url(self.verified_course))
+        response = self.client.get(reverse('courseware', kwargs={'course_id': str(self.verified_course.id)}))
         self.assertContains(response, TEST_VERIFICATION_SOCK_LOCATOR, html=False)
-        self.assertContains(response, UPGRADE_MESSAGE_CONTAINER, html=False)
 
-    @override_waffle_flag(COURSE_HOME_USE_LEGACY_FRONTEND, active=True)
+    @override_waffle_flag(COURSEWARE_USE_LEGACY_FRONTEND, active=True)
     @override_waffle_flag(DISPLAY_COURSE_SOCK_FLAG, active=True)
     def test_masquerade_as_verified_student(self):
         user_group_id = self.get_group_id_by_course_mode_name(
@@ -86,11 +84,10 @@ class TestVerifiedUpgradesWithMasquerade(MasqueradeTestBase):
         )
         self.update_masquerade(course=self.verified_course, group_id=user_group_id,
                                user_partition_id=ENROLLMENT_TRACK_PARTITION_ID)
-        response = self.client.get(course_home_url(self.verified_course))
+        response = self.client.get(reverse('courseware', kwargs={'course_id': str(self.verified_course.id)}))
         self.assertNotContains(response, TEST_VERIFICATION_SOCK_LOCATOR, html=False)
-        self.assertNotContains(response, UPGRADE_MESSAGE_CONTAINER, html=False)
 
-    @override_waffle_flag(COURSE_HOME_USE_LEGACY_FRONTEND, active=True)
+    @override_waffle_flag(COURSEWARE_USE_LEGACY_FRONTEND, active=True)
     @override_waffle_flag(DISPLAY_COURSE_SOCK_FLAG, active=True)
     def test_masquerade_as_masters_student(self):
         user_group_id = self.get_group_id_by_course_mode_name(
@@ -99,6 +96,6 @@ class TestVerifiedUpgradesWithMasquerade(MasqueradeTestBase):
         )
         self.update_masquerade(course=self.masters_course, group_id=user_group_id,
                                user_partition_id=ENROLLMENT_TRACK_PARTITION_ID)
-        response = self.client.get(course_home_url(self.masters_course))
+        response = self.client.get(reverse('courseware', kwargs={'course_id': str(self.masters_course.id)}))
+
         self.assertNotContains(response, TEST_VERIFICATION_SOCK_LOCATOR, html=False)
-        self.assertNotContains(response, UPGRADE_MESSAGE_CONTAINER, html=False)