* Commits:
  Add get-accessor helper for discussions plugins
  Add is_enabled helper for discussions plugins

In the edx.org-next theme, the completion green check-
marks and the little bookmark icons were appearing on every
single unit. This was because a fontawesome CSS rule
in the new theme was overriding the `display: none`,
as set by `.is-hidden`, to be `display: inline: block`.

The fix is to add `!important` to a couple definitions
of `.is-hidden`. Definitely somewhat hacky, but this is
SCSS that we plan to deprecate at some point anyway.

TNL-7823

Sets default X-Frame-Options for login and registration forms to environment setting

Commit 7f59688f attempted to solve this using
`CourseOverview.course_exists`, but that check is case-
insensitive. This commit instead does a small refactor
to `lms.djangoapps.courseware.get_course` so that we can
handle a failed course lookup without broadly catching
a `ValueError`.

fixed quality issues

added comment

updated for comments

fixing test

removed typo

readded files

moved settings override

testing adding other keys

not overriding setting

Merge pull request #25916 from edx/testeng/bokchoy_auto_cache_update_322bb08cae4168425cd5fa8cc3dea360e9e868c9

Bokchoy Testing DB Cache update

Python Requirements Update

* Commits:
  Implement a new configuration system for discussions plugins

Additional details available in the attached decisions document.

Co-authored-by: Kshitij Sobti <kshitij@sobti.in>
Co-authored-by: stvn <stvn@mit.edu>

Anonymous users (like crawlers) requesting non-existent courses
should get 403, just like logged-in users do. They instead raised
a ValueError.

Revert "Added endpoint to retrieve IDV photo urls"

This reverts commit 356f1875.

fixed quality issues

added comment

updated for comments

AA-496: Don't show reset deadlines banner if no graded problem is pas…

When determining completion status to show on the vertical, we take
into account if the problems are graded and scored (have a score
and weight). Now we take that into account in regards to showing the
banner inside the vertical too

[BD-21] Fix deprecated waffle usage

[MST-575] Enable timed exams by default

Add default value for learner records feature toggle in settings

The learner records feature had to be enabled/disabled via site-specific
configuration models, which is inconvenient for platforms that want to
disable this feature globally. Here, we introduce a
ENABLE_LEARNER_RECORDS feature toggle in the lms/cms settings that makes
it possible to disable this feature on all sites. Because this feature
toggle is set to True by default, this will not modify the behaviour of
existing platforms.

Python Requirements Update

Update site width in core

AA-131: Allow anonymous users through course home MFE

The old URLs now serve the new logo, but at the old pixel size.  These
URLs serve the new logo at a natural pixel size.

Fixes for Shift deadlines during masquerade in Learning MFE

The change to masquerade in the courseware view allows the proper
viewing of the xblock from the perspective of the masqueraded user.
In this case, it allows a staff user masquerading as a learner to see
their shift dates calls to action inside the MFE (the old view already
had this set up). The second change allows the staff user masquerading
to reset the schedule of the learner being masqueraded via the CTAs

WS-1591: change Prospectus user dropdown to show avatar instead of username

update hls.js to latest version