Updates to use the is_anonymous flag of basket calculate

[LEARNER-4913]

Update retirement APIs to match spec

LEARNER-4880 added confirmation modal for account deletion

Yro/EDUCATOR 2700

make userorgtag deletable

UnregisteredLearnerCohortAssignments can retire users.

Prepend unicode signature (BOM) to csv reports

Changes the DeletableByUserValue delete algorithm.

Update support form.

TE-2546 Remove obsolete requirements files

Yro/EDUCATOR 2644

ENT-945 Apply logic for taking into account SSOVerifications

asadiqbal08- ENT-645 - Enterprise version bump 

[ENT-645]- Updated the messages when a learner leave an organization.

for MS Excel 2013 compatibility

Changing the contact-us link

Update support form to auto select course and make course
selection required to submit form.

LEARNER-4254

Redirection to the newly created support form. If the server is production
it will take to production support form otherwise it will be forwarded to
Stage server support form.

LEARNER-4873

[ENT-924] Revert "Revert "Show Enterprise display name if we should hide sensit…

Report the RELEASE_LINE in a meta tag

Merge pull request #18022 from edx/testeng/bokchoy_auto_cache_update_d9252d990137c43d4aba1ea98d513f728cc1b735

Bokchoy db cache update

fix outline progress

added admin site settings

ENT-944 Create SSOVerifications for users in tpa pipeline based on provider's settings