This is a follow-up to edx#1087, which reverted this change.
According to the PR comments, parsing strings with XML comments inside them was
causing errors. This does not seem to be the case anymore - these strings are
just hidden when the block is rendered, but they are not breaking XBlocks.
This also handles (ignores) the comments that could be added directly to the
LibraryContentBlock in the XML export by users.

* feat: added logging in import status view

the latest version contains an update that reduces the amount of celery tasks
triggered by name affirmation updates

fix: simplify most recent verification function

current use is much less complicated than old code

The lack of ordering for a django query that grabbed verification records is blocking learners with multiple SSO records from taking proctored exams. All IDV records should be sorted by a key first, and then the correct expiration date can be determined.

* fix!: Removes the openedx provider temporarily

UI changes to support the new provider are in progress. Once they are ready we
can add back this provider.

* feat: add support for hiding providers from the API response

Contingent on new feature toggle `VERIFY_USER_CHANGE_UNCONDITIONAL`, check
for request/response user mismatches on all requests, not just those
setting a session cookie on the response.

This is intended to *restore* an older behavior. I believe that almost all
requests used to set a new session cookie, and for some reason no longer
do, so this is really just an attempt to return to that previous behavior
no matter whether a new session cookie will be set. (Previously, the
cookie-to-be-deleted check would still have been in effect, so this is
actually a slight change from the earlier behavior -- the logout response
will now be included, and then quickly ignored due to a later check.)

The off-by-default switch moves several lines of code out of a try block,
but also out from under an if guard that checks for certain cookie
conditions. The movement out of the try block should be irrelevant, since
neither of the relocated lines should be raising a SafeCookieError.
However, there is some chance that they could raise other exceptions when
called from their new location (and new situations), hence the use of a
feature toggle -- we'll want to make it easy to switch the new behavior off
quickly if we start seeing an increase in errors.

Once the change is well-exercised, we can remove the toggle and the old
call locations.

I'm not entirely sure about the change to the `verify_error` utility
function in the unit tests, but it seems like even unauthenticated requests
in Django end up with a user and session on the request object, so this is
probably a close-enough way to mock that out.

I duplicated a couple of tests to test with feature toggle on/off.

ref: ARCHBOM-1952

This PR is an update on https://github.com/edx/edx-platform/pull/29280

This defines optional extra fields that are not hidden under the toggle on the 
registration page.

* feat: Adds a new discussion topic configuration mechanism

The new discussion configuration system links discussion topics directly to the course structure. This change adds a new task that sends a discussion update signal if there are any changes to the course. This signal includes all the context needed to update the configuration of the course.

The handler for this new event will create a new entry for each unit that needs a topic in the database. In the future this will be used to see the topics in the course.

* fix: add support for marking a provider as supporting LTI

* fix: review feedback

Removed hardcoded edx user info cookie name and used settings variable.

I have come across these unused variables and thought it's good to remove and clean up the code.

* feat: Django codemods on LMS (2)

* fix: Miscellaneous styling fixes for mobile

* fix: Add px fallback since outlook doesn't support rem

ENT-5095

* chore: update deprecated import from collections

* chore: remove outdated imports from markdown library

as it hasn't been supported since 2.0.3 and we're on 3.x.
This was deprecated at least as early as 2012!

* docs: add docstring and remove lint-amnesty to markdown plugin

* chore: remove deprecated etree import

* style: remove unnecessary-comprehension for sets

* style: resolve a number of amnestied pylint complaints

Co-authored-by: stvn <stvn@mit.edu>

feat: [AA-1082] fix 500 error on courses dashboard

When there are no selected blocks, the dict comprehension to
compare is throwing an exception. Handle the error more gracefully.
The blocks will not be sorted, but they should not be filtered.

* fix: pin docutils<0.18 due to Sphinx requirement

* fix: use pngs for the goal reminder email banner and remove redundant unsubscribe link

* fix: update

* fix: Miscellaneous UI fixes and fixed unsubscribe link

* feat: added program discussions admin view

* refactor: updated docstring

* refactor: updated constant

feat!: [BD-13] Deprecate ModuleSystem.render_template

When signing in from the LMS, the authentication request succeeds but
the user was never redirected to the dashboard. This is because of a
js error:

    Uncaught TypeError: userCookie is null
        userFromEdxUserCookie
        http://maple.openedx.overhang.io:8000/static/js/student_account/utils.js:32

The error comes from the fact that the util.js code ignores the
EDXAPP_EDXMKTG_USER_INFO_COOKIE_NAME setting name. Instead the cookie
name is abritrarily prefixed by "stage-" or "prod-" depending on the
hostname. This seems to be primarily motivated by the definition of
edX.org staging/prod environment hostnames :-(

To resolve this issue, we decided that the actual cookie name was not so
important. Instead, the js code needs to not crash even when the cookie
is absent.

This issue was first reported here:
https://github.com/edx/edx-platform/pull/28170#issuecomment-890449885

Close https://github.com/openedx/build-test-release-wg/issues/104

fix: use pngs for the goal reminder email banner and remove redundant unsubscribe link from the email (#29215)

* fix: use pngs for the goal reminder email banner and remove redundant unsubscribe link

* fix: update

fix: fix issues with LANGUAGE_CODE for legacy UI [BB-4823] [OSPR-6196]

chore: upgrade edx-proctoring to 4.7.0