Fix learner profile bug and tests that didn't catch it

Revert "Merge pull request #15939 from edx/efischer/ora_204"

Add zh_HANS language mapping to pdfjs

This reverts commit a403fd14, reversing
changes made to b31287e2.

500 errors on prod, need to rethink this fix.

ENT-608: edx-enterprise version upgrade to 0.42.0

EDUCATOR-1267 Add logs in importing the course.

restrict ace deps

LEARNER-1860: Course certificates on the learner profile

LEARNER-1860

RET triggered emails

edx-ora2 2.0.4 release

[ENT-496] Bump edx-enterprise to 0.41.0.

update to resolver complete my program purchase to work with no-id-pr…

LEARNER-2420

Fixed a11y on course actions dropdown menu on dashboard

ENT-619 Clean usernames coming from identity providers

This incorporates a migration that copies data
from certain models to another.

Remove flaky bok choy test test_perform_problem_reset_and_navigate

LEARNER-2430

Audit learners are now shown a prompt to upgrade to the verified track
of the course run. This message goes away after the learner upgrades.

Update translations (autogenerated message)

Add profession & specialty fields to registration page

Update to Certs Date String

Revert "Merge pull request #15641 from jspayd/toggle-timer-upstream"

This reverts commit 0c204e35, reversing
changes made to 0495d70b.

The site configurations can now set 'Profession' and 'Specialty' as
fields on the registration page.  The list of potential professions and
specialties to choice from can also be set from the site configurations
by setting 'PROFESSION_OPTIONS' and 'SPECIALTY_OPTIONS'.

WL-1098

account for delete state in grading code

Deactivate date display if no cert active

Since we have started integrating with more clients, we have found that the usernames
that get passed are not compatible with our username restrictions. This PR introduces
a function to clean usernames to make them compatible, particularly in the auto registration
case.