This PR might be causing e2e tests to fail. Reverting and merging without waiting on tests.

This was to support an experiment in using coverage test contexts to
record what tests ran each line of code (informally known as
who-tests-what, or wtw).   It never became operational.

Add country code in MFEAppContextView

add new api MFEAppContextView to handle country code
add unit test MFEAppContextViewTest
this newly created api will be marged in TPAContextViewTest when margeing code in master branch

VAN-366

update login api

Modify the existing login api in a way that
it will allow the user to login via username as well.
currently it is only allowing email to log the user in.

VAN-445

Previously, ProblemBlock's implementation was split between
CapaMixin/CapaFields (in capa_base.py) and ProblemBlock
(in capa_module.py), the former being the base classes of the
latter. The split existed for a historical reason:
as a former XModule, ProblemBlock was once split
between CapaDescriptor (author-facing) and CapaModule
(learner-facing). Since ProblemBlock has been converted
to being a pure XBlock, the division between the base
classes and the block class are no longer necessary
nor semantically helpful.

docs: Flesh out ProblemBlock's docstring a bit.

updating thresholds after security fixes #27391

upgrade edx-enterprise to 3.22.8

fix: fix bug with `revoke_program_certificates` task

Added username suggestions functionality upon username already exists
validation error for both registration and registration validation
endpoints.

VAN-52

Mergeback PR from private to public.

Fix XSS for numerous files

fix: TNL-8233: Change exception raised at problem creation failure from generic exception to LoncapaProblemError. (#27361)

Raising this specific exception will cause the failure to be handled more gracefully by problem rescoring code.

count

[MICROBA-1163]

This change will correct an issue in the Program Dashboard where a user
would see a course as completed, but not see their Certificate because
it was not available to them yet.

[MICROBA-1164]
* cast `course_key` as a string when scheduling the `revoke_program_certificates` task
* Update existing unit tests
* Move test utility method in test_tasks.py out from the middle of the test cases
* Fix spelling in test function name

Currently when a certificate availability date is set the text on the
course dasboard is confusing to the learner and could lead them to the
wrong conclusions. The cert should not be available until on or after
the available date.

ENT-4483 | added search_emails endpoint in accounts.

* Code Refactoring
This PR bumps code coverage by adding unit tests & clean up some code for improving code quality and maintainability. 

Refactor: disable xsslint for numerous files

Co-authored-by: SaadYousaf <saadyousaf@A006-00314.local>

* Commits:
  fix: Grant course staff access to discussions API
  refactor: Make discussions helper method more accessible

* Deletes custom get_search_results() method, since `enterprise_customer__name` is now a viable search field
* Improves pagination by asking for an estimated row count from Mysql INFORMATION_SCHEMA.TABLES
* Turns 1 + N query into 1 query via proper use of list_select_related

ENT-4384

to match expected behavior.

so we can use it elsewhere.