* Integrating olxcleaner in course import

* Adding toggle removal date and addressing pylint issues.

Currently the registration endpoint has no rate limit. Added a new ratelimit
variable to support the change, it's value is set to 60/7d.

VAN-302

* Revert "Revert "fix: Stop rendering Visibility and Move buttons on libraries (#26885)" (#27113)"

This reverts commit 23443c43.

* fix: change method of accessing course id

Fixes an issue where the button that linked to edX documentation for
course teams in Studio that displayed beside the logged-in user's username/
drop-down menu is gone. Regression from PR #26106

Ref: TNL-8138

Fixes bug introduced by #25965 (commit dd96a2) pointed out in:

  https://github.com/edx/edx-platform/commit/dd96a2#r48570091

The next button redirect at the top of the sequence in Studio's Unit editing view
was not going to the correct location.

This reverts commit 777bb633.

We're fixing an error that appears when you click the "edit access"
button on an XBlock in the library page.

Libraries in the "Add library" page shouldn't have the accessibility
config icon. Access settings for libraries are changed at the top, on
Settings > User Access. When clicking the access-button (the cog) on a
Library, an error appears. This is known to happen on koa.master and
open-release/juniper.3.

This happens due to the way XBlocks are rendered; as they get rendered
initially, the previews are unaware of whether they're part of a
library. We can confirm this by refreshing the page, this makes the
button disappear.

This fix removes the cogwheel when the XBlock is part of a library.
This doesn't affect the XBlocks imported to courses because those are
rendered on a Randomized Content XBlock, which does have its access
options.

Authored by: Daniel Francis <daniel.francis@opencraft.com>

site configuration to email context.

* Improved logging for import

* Refactored code

* Refactored code

* Refactored code

* Refactored code

* Refactored code

* refactored code

* Refactored code

* Updating log

Co-authored-by: Awais Jibran <awaisdar001@gmail.com>

AA-461

tests are failings and complaining related objects doest not exists in
User table. Create object in test setup to fix it.
In another fix article id was giving integrity error.
Fixing task test.

tests are failings and complaining related objects doest not exists in User table. Create object in test setup to fix it.
In another fix article id was giving integrity error.
Fixing task test.

* Introduces the idea of content errors into the learning_sequences
  public API, accessible using get_content_errors().
* Makes course outline generation much more resilient to unusual
  structures (e.g. Section -> Unit with no Sequence in between),
  with the understanding that anything that doesn't conform to the
  standard structure will simply be skipped.
* Improves the Django Admin for learning_sequences to display
  content errors and improve sequence data browsing within a course.
* Switches the main table viewed in the Django admin from
  LearningContext to CourseContext, which is appropriate since only
  course runs generate outlines.

This was done as part of TNL-8057, with the end goal of making
course outline generation resilient enough to switch over apps
to using the learning_sequences outline API. The types of course
structure errors that this PR addresses cause display issues even
in the current Outline Page experience, but would break the outline
generation for learning_sequences altogether.

The approach for error messages here is very generic, to keep
modulestore concepts from seeping into learning_sequences (which is
not aware of the modulestore/contentstore). We may need to address
this later, with a more normalized content error data model.

While the Django admin page is backwards compatible with the old
versions of the models, we should run the backfill_course_outlines
management command after deploying this change, to get the full
benefits.

Adding new functionality is going to require running this command
on all courses, not just ones that have it missing.

In https://github.com/edx/edx-platform/pull/25955 `HiddenDescriptor`
(which was a subclass of `RawDescriptor` with a custom `student_view()`)
was converted to an XBlock. It is used as the `default_class` by the
`CachingDescriptorSystem` classes. However `RawDescriptor` is still
being used by `XMLModuleStore`. This has been replaced by
`HiddenDescriptor` as well.

The Studio UI prevents you from creating a Section or Subsection
with no title (display_name). But OLX import allows you to bypass
these checks and create Sections ("chapter" tag) and Subsections
("sequential" tag) without display_name information specified in
the XML. When this happens, Studio and the LMS fall back to using
the url_name (the last part of the UsageKey) as a title, using the
display_name_with_default method.

This usually works, because url_names are derived from the import
file name, and if you're hand-editing a course in XML, your file
names are probably more intelligible than Mongo object IDs. In any
case, this commit updates get_outline_from_modulestore to match the
behavior of Studio and the LMS with respect to this situation.

This is part of the course outlines backfill rollout. TNL-8056

If we are seeing an anonymous user, but the segment user id is still
set, we believe the segment user id is coming from a different user on
the same machine. This will make sure we clear out that storage and
then the indentify call will make a new anonymous id

* Adds the backfill_course_outlines management command to contentstore
* Adds a read-only Django admin interface to learning_sequences for the
  support team and debugging.
* Adds two new functions to the learning_sequences public API:
  key_supports_outlines and get_course_keys_with_outlines

The learning_sequences app isn't supposed to know about contentstore or
modulestore, as it's intended to be extracted out of edx-platform in the
long term. Therefore, the backfill_course_outlines command is in
contentstore, and not learning_sequences.

This work was tracked in TNL-7983, but it also fixes a bug where we were
trying to generate course outlines for libraries (TNL-7981).

All Open edX instances upgrading to Lilac should run the
backfill_course_outlines command as part of their upgrade process.

The terraform policy for the export is already attached to the worker role
AA-461

The setting overrides should've been cleaned up in a previous
commit, but I missed them. This change is a no-op.

Previously, deprecated [lms|cms|common]/djangoapps
import paths would only raise errors if the
ERROR_ON_DEPRECATED_EDX_PLATFORM_IMPORTS
flag, which defaulted to False (but is overriden
to True for Devstack and *.edx.org), was enabled.

This change removes that setting and always raises
on use those deprecated import paths.

S3 URLs served by Blockstore have a max TTL of
1hr, since the temporary credentials the Blockstore
uses to sign the URLs themselves have a TTL of
1hr. Thus, we must cache Blockstore bundles for
less than 1hr.

TNL-7771

django-not-configured is an error raised by pylint (with
the pylint-django plugin) when it's not correctly configured.

We should not be applying lint amnesty for such a violation.

* pyupgrade on contentstore/views

* Apply suggestions from code review

Co-authored-by: Usama Sadiq <usama.sadiq@arbisoft.com>

Co-authored-by: Usama Sadiq <usama.sadiq@arbisoft.com>

Things other than highlights may be exported in the future. The storage class is flexible so backends other than s3 may be used in the future.
AA-461

* pyupgrade on cms api,contentstore and cms_user_tasks apps

* pyupgrade on contentstore/tests