ECOM-4478

This reverts commit 65f13dde.

This reverts commit 88dd85ca, reversing
changes made to bf8aef33.

Although we are phasing out our support of OIDC, this particular feature will allow us to eliminate many of the settings we
share across services. Instead of reading various endpoints and secret keys from settings or hardcoded values, services
with the proper authentication backend can simply read (and cache) the information from this endpoint.

ECOM-3629

EDUCATOR-15

Some result sets may be larger than the default cache's 1 MB max item size. This change is a bandaid meant to allow us to resume use of memcached while we work on a longer-term fix.

LEARNER-682

This change brings the Credentials API calls in line with those of other services. The change also makes it easier for the future switch to an asymmetric signing key.

LEARNER-629

This information mirrors the fields returned in our ID token for OpenID
Connect (OIDC). Including this information will allow us to eventually
migrate toward replacing OIDC with OAuth 2.0 + JWT.

ECOM-3628

This modifies the lang-pref django app to:
a) Use the current value of the 'edx-language-preference' cookie to set the
   users Accept-Language header on an incoming request.
b) At the end of the request, update the 'edx-language-preference' cookie
   to reflect the users current Language Preference choice, if any.

[LEARNER-542]

We want to treat professional certificates equally for the purposes of program completion.

LEARNER-601

ECOM-7746

This reverts commit 1224e341. I've also added
NotImplementedPartitionScheme, which allows deprecated partition types to have
a valid entry point despite being unusable.

TNL-6675

TNL-6743

This command has been updated to treat professional and no-id-professional
enrollments in the same manner.

ECOM-7442

This command has been updated to treat professional and no-id-professional
enrollments in the same manner.

ECOM-7442

Enrollments with the no-id-professional mode are treated as professional
when determining program progress.

ECOM-7442

ECOM-4776

ECOM-7385

Turn override into a sensible default that calls both of the
for_request and in_model submethods, which are themselves still
avaiable if needed.

This functionality has been in production for a few days, and will not
be disabled. This switch can now be removed.

ECOM-7650