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.

Fix bug in metric temp_flag_no_request_default_match.
Metric renamed to temp_flag_no_request_default_match_2
to ensure we are looking at the right data.

This extends Phase 1 of the rollout, as documented in:
https://github.com/edx/edx-platform/pull/24392

ARCHBOM-1331

ENT-3073

Once USE_DEFAULT_TRUE_NAMESPACE is fully rolled out
and proves to return True where we wish, we can
remove this temporary roll-out flag introduced in:
https://github.com/edx/edx-platform/pull/24322

ARCHBOM-1316

dlichen/AA-202 setup

* MICROBA-393 Add customized partner report headings

* Add sorting

This is Phase 1 of a 2 part rollout.

Here, we want to ensure that checking if the waffle flag
is set to active for everyone would provide the same value
as the current implementation for calls that have no request.
The current implementation is to use flag_undefined_default,
which is deprecated and we are trying to remove.

We are adding a custom metric to see if they match in
Production. If all goes well, in Phase 2 we will switch to
this new approach.

ARCHBOM-1331

[BD-10] [DEPR-83][DEPR-81] Remove pattern library in course_home.py

Constrain edx-enterprise.

optimize course enrollment count query

This will allow for more controlled releases of enterprise code in edx-platform.

In order to remove the deprecated flag_undefined_default=True
argument, this commit updates the following flags to always be
enabled using a new temporary class:

- course_experience.course_outline_page
- course_experience.unified_course_tab

Adds a temporary setting `USE_DEFAULT_TRUE_NAMESPACE`,
to enable a monitored rollout of this change.

TNL-7061 is the ticket where these flags will actually be
removed. This requires more careful work including removing
all dead code, and potentially refactoring tests that were
testing shared functionality, but only when the flag was
False.

ARCHBOM-1316

AA-220: Making Library Content an Aggregator CompletionMode

Turn on enterprise integration in devstack settings.  We are first-class citizens, and we demand respect! :p