Scheduled emails show "unsubscribe" link if waffle switch
`schedules.course_update_show_unsubscribe` is enabled, and
settings.ACE_ENABLED_POLICIES respects `bulk_email_optout`.

API endpoint allows GET/POST requests, which:

* GET asks for confirmation of opt-out
* POST accepts "unsubscribe" or "cancel", where "unsubscribe" creates the
  Optout entry, and "cancel" does nothing.

Fixes flaky tests:

* The resolvers handle users in "bins", which are groups that depend on the user ID.
* The test user ID varies depending on the test order.
* This change ensures that the bin requested matches the user for the test.

fix flaky test_login unit test

ARCH-1253

Upgrade edx-enterprise

Students can't create team in an instructor-managed topic

Move account_settings into user_api.

Add ENABLE_COURSEWARE_SEARCH_FOR_COURSE_STAFF flag

log exception for further context

ARCH-1253: return json for third party auth failure

Returning JSON from `login_user` for third party auth failures makes
the response more consistent with all other `login_user` responses.

The only calls to `login_user` with this failure are processed by
`shim_student_view` which will in-turn remove this JSON. This improves
the `login_user` response in advance of switching the logistration page
to use `login_user` without `shim_student_view`.

ARCH-1253

Add an LMS feature flag to enable courseware search for course staff
only. TNL-6931

EDUCATOR-4820 Update edx-ora2 to 2.4.7

Fixes for the blockstore API client / XBlock runtime under python 3

ARCH-1253: clean-up login part 1

Revert "Revert "ENT-1849: Removed EnterpriseMiddleware""

fix logs condition

`shim_student_view` is used for login, and is being simplified so it
can ulimately be completely deleted. In this commit, the shim
preprocessing was removed by deleting unused code, and moving code
that is still being used to login_user.

Note: `shim_student_view` was originally added in
https://github.com/edx/edx-platform/pull/5768/files

ARCH-1253

Rename start in schedule 2/5

ARCH-1253: remove studio signin and signup pages

This completes the work started in https://github.com/edx/edx-platform/pull/19453
to use the LMS login and registration for Studio, rather than Studio
providing its own implementation.

LMS login/registration are being used for the following reasons:
1. LMS logistration properly handles all SSO integrations.
2. A single logistration is simpler to maintain and understand.
3. Allows Studio to work more like all other IDAs that use LMS
logistration.

The original switch to use LMS logistration for Studio also added the
toggle `DISABLE_STUDIO_SSO_OVER_LMS` to provide the community some
additional time for switching. This commit removes this toggle, which
at this point means all deployments will use the LMS logistration.

This change requires sharing cookies across LMS and Studio. Should that
prove to be a problem for certain Open edX instances, there are
discussions of possible alternative solutions.
See https://github.com/edx/edx-platform/pull/19845#issuecomment-55915425...

Added devstack config yml file to app repo

Move AccountCreationForm to user_authn.

ora version bump

Adds "Manage" sub-tab to course "Teams" tab
with UI for downloading and uploading team
membership CSVs. The upload and download function-
ality are currently not implemented.

The new tab only appears when the user is course staff
and the course has at least one instructor-managed
team-set, which is not the case for any existing
courses, so not current course staff will see this
change.

This ticket will be followed-up upon in MST-44 and
MST-49.

MST-41

Support courses with only a verified mode