[TSD] Annotates block structures settings and waffle switches

[BD-21] Remove soon-to-be-deprecated value monitor in edx-toggles

This includes the following settings:

- BLOCK_STRUCTURES_SETTINGS : setting dictionary which stores the other different block structures related settings

- BLOCK_STRUCTURES_SETTINGS['PRUNING_ACTIVE'] : keeps only a specific number of versions of each block structure, and deletes the rest

- BLOCK_STRUCTURES_SETTINGS['COURSE_PUBLISH_TASK_DELAY'] : specifies the delay, in seconds, after a new edit of a course is published before updating the block structures cache

- BLOCK_STRUCTURES_SETTINGS['TASK_DEFAULT_RETRY_DELAY'] : Specifies the delay, in seconds, between retry attempts for block structure tasks

- BLOCK_STRUCTURES_SETTINGS['TASK_MAX_RETRIES'] : specifies the max number of retries per block structure task

- BLOCK_STRUCTURES_SETTINGS['STORAGE_CLASS'] : specifies the storage which block structures would be saved to when storage backed block structures are enabled

    Example: 'storages.backends.s3boto.S3BotoStorage'

- BLOCK_STRUCTURES_SETTINGS['STORAGE_KWARGS'] : specifies additional arguments needed when utilizing storage for storing storage backed block structures

    Example: { bucket: 'test-edxapp' }

- BLOCK_STRUCTURES_SETTINGS['DIRECTORY_PREFIX'] : specifies the path to which storage backed block structures are saved

    Example: '/courses/'

This also includes the following waffle switches:

- block_structure.storage_backing_for_cache : enables storage backed block structures, used to retrieve the block structures from storage instead of regenerating the structure, when not available in cache

    it is important to note that this is important for production because it reduces response times on block structure related apis

- block_structure.raise_error_when_not_found : raises an error if the block structure requested doesnt exist in store or is outdated

- block_structure.invalidate_cache_on_publish : invalidates the block structure cache when courses are published

For an example with additional context, see the following forum post:

https://discuss.openedx.org/t/help-please-very-slow-load-time-10-seconds-for-courseware-on-sections-with-several-subsections-and-xblocks/2998/16

This also includes information about the toggles that will likely be deprecated and removed:

https://github.com/edx/edx-platform/pull/26175#issuecomment-769080286

[BD-21] Improve test coverage of toggle state view

[TSD] Annotate course_experience.calendar_sync

[TSD] [SE-3990] Add in standardized documentation for Badgr-related settings.

AA-492: Adds research tracking event for reset deadlines

This PR also removes the exemption for staff from seeing the reset
deadlines banner (staff will now see the banner). Staff users would
still be unable to submit problems and wouldn't have a way of resetting
their deadlines while enrolled.

[MST-515] Automated proctoring requirements email

In SystemWideEnterpriseUserRoleAssignment, Use either applies_to_all_contexts or enterprise_customer
if they are True or non-null, respectively, in determining the result of get_context(),
but continue to return list of all linked enterprise customer UUIDs if not, (which is the current behavior).
This is a small step on our journey to explicitly defining user-role assignments.

We are affected by this issue:
https://github.com/jazzband/django-pipeline/pull/297#issuecomment-264416094

In particular, this occurs when trying to upload js assets to s3, such
as with the Scorm xblock:
https://github.com/overhangio/openedx-scorm-xblock/issues/16

This issue is resolved by upgrading django-pipeline to 2.0.3+, as the
fix was introduced here:
https://github.com/jazzband/django-pipeline/pull/715

Post Python38 clean up process

update threshold after IM security fixes 6

Python Requirements Update

Add Anonymous ID related ADR.

For a given course/user tuple, anonymous ID will not change once it
has been generated and saved.

[TSD] Adding FEATURES[‘ENABLE_EDXNOTES’] annotations

fix PEP8 W291 trailing whitespace

fix too long lines

adding specified django settings for edx-notes-api

change toggle_description

checking CI tests

Final corrections for ENABLE_EDXNOTES toggle

[TSD] add annotations for ALLOW_EMAIL_ADDRESS_CHANGE feature flag

[TSD] annotations for student.courseenrollment_admin

[TSD] adds annotations for XBLOCK_SELECT_FUNCTION

Change how xBlock URLs are generated to be able to rotate SECRET_KEY

Mergeback PR from private to public.

feat: Move student.courseenrollment_admin from LegacyWaffleSwitch t a WaffleSwitch and add annotations

Revert "BOM-2245 : Unpin python-dateutil"