Correct logic on building marketing links.

Get user email from request

Bump edx-when to 1.2.9

PROD-674

This prevents seeing due dates for enrollments originally created
too close to the course end to allow for finishing the course in time.

AA-195

The logic used to has a special case for edge in the hostname which
didn't really make sense. So instead we just check to see if the given
url starts with http and if it does we return it directly.  If it doesn't,
then we try to convert it to a valid url and return that.  If that fails
we return .

Add a new custom metric `unresolved_marketing_link` to track when we
run into this scenario.

Adding in missing field to the DateSummarySerializer

[BD-6] Use PyPi release of django-ratelimit

* testing

* updates to drop down

* unit tests. env changes were copied based on other MFEs in LMS

* added exam settings link to other course settings pages

* fixed pylint errors

* updates for requested changes

* updates for requested changes, as well as changes for xss linter

If this reverse failed, it was throwing a 500.

This is the final step in removing the deprecated
flag_undefined_default as explained by the following ADR:
https://github.com/edx/edx-platform/blob/master/openedx/core/djangoapps/waffle_utils/docs/decisions/0001-refactor-waffle-flag-default.rst

Notes:

* All uses of flag_undefined_default=False were always
  supposed to have been no-ops.
* All uses of flag_undefined_default=True that are removed
  in this PR have been replaced by migrations in past PRs.
* The temporary metric temp_flag_default_used id no longer
  reporting any data.

ARCHBOM-1305

Create a Javascript function to log upsell events to & attach the eventing to the course dashboard upsell button. The revenue squad is looking for more insight into which buttons users are clicking to get to the checkout page.

Deprecate old idv emails

Fixed email sent on valid sso verification

Catch the 500 in this case and throw a 404 instead.

AA-200: Redirecting logged out users on Dates Tab

ARCHBOM-1298 Validate before accessing email parts.

For somereason earlier validation is not ensuring that we have a valid e-email.
In this case, break out of the flow since we don't have a domain that's in our
list and log the user's id so that we can learn more about when this happens.

By a reading of the code flow, it doesn't seem like it should be possible except
with a handful of users that have invalid e-mail addresses in the database but it
seems to be happening pretty regularly.

The ENABLE_FORUM_DAILY_DIGEST config was using both
a Django Setting and a waffle flag. This consolidates
this to simply use the single Django Setting:
FEATURES['ENABLE_FORUM_DAILY_DIGEST'].

ARCHBOM-132

This is Phase 2 if a rollout started here:
https://github.com/edx/edx-platform/pull/24392

When a flag is being used without a request, we will
return True if the flag's everyone status is set to
True.

The current implementation is to use flag_undefined_default,
which is deprecated and we are trying to remove it.

ARCHBOM-1331

Merge pull request #24415 from edx/testeng/bokchoy_auto_cache_update_bac4b8ed6fb3d1273f95cf244f6242b76f73731e

Bokchoy Testing DB Cache update

DEPR-43 - Remove final shoppingcart references from instructor.

DEPR-43 Remove shoppingcart certs refs.

DEPR-43 - Remove shopping cart from instructor analytics.

Used django-ratelimit instead of django-ratelimit-backend
to configure two different rate limit configurations for same
endpoint.

PROD-1708

Ratelimited `login_user` endpoint using `django-ratelimit`, also
decreased default value of logistration rate limit to 100 requests
per five minutes per IP.

PROD-1877

update edx-enterprise version

There's a chance that the whole management command should be removed since we
don't do change modes with the command anymore but that's a different problem
for a different day I think.