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-559154256

Detailed changes:
* Fix some Studio links that still went to old Studio signin and signup.
* Remove DISABLE_STUDIO_SSO_OVER_LMS feature toggle.
* Remove old studio signin and signup pages and templates.
* Fix url name "login", which had different meanings for Studio and LMS.
* Use the following settings: LOGIN_URL, FRONTEND_LOGIN_URL,
FRONTEND_LOGOUT_URL, and FRONTEND_REGISTER_URL.
* Redirect /signin and /signup to the LMS logistration.
* Add custom metric `uses_pattern_library`.
* Add custom metric `student_activate_account`.
* Add Django Settings to allow /signin, /signup, and /login_post to be
disabled once ready.

This work also relates to ARCH-218 and DEPR-6.

ARCH-1253

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

BOM-1028

geoip2: update maxmind geolite country database

Bump the versio

Remove this test because it is flaky.

Revert "ENT-1849: Removed EnterpriseMiddleware"

It failed and passed on the same commit.  The failure was that the page
timed out, so it could be fixed by making that page performant.  I'd
rather not increase the timeout for the page to load as the bokchoy
tests are already very slow.

I'm also not sure why this test needs to exist.  I would think that this
could be tested on the underlying function without testing at the UI
layer.

BOM-1075 - Fix coverage reporting for python3 unit tests.

[PROD-736] Course outline links incorrect in subsections with staff-only units

conditional logs to find the inconsistent block id in MITx course

Fix quote Unicode data

These are used in the coveragerc to referr to equivalent paths for when
combining coverage files.

ARCH-1312: Remove old login and registration templates.

Activation email to ace

Python Requirements Update

Uri added for explore new program

PROD-1004

* no student change to instructor managed team

* Address comments & fix unit tests

* fix jenkins test failure

* Fix eslint errors

* Fix xss warnings

* Fix bokchoy test

ARCH-1253: remove unused login ajax error url

ARCH-1253: switch login_user errors to 400