Refactor Code for LEARNER-5257

Lduarte1991 annotations deprecation

Course key object was not serializable before sending to celery
task.

Merge pull request #18594 from edx/tasawer/learner-4467/fix-exception-handling-in-award-program-certificate-task

Fix exception handling in award program certificate task

There are other annotations features still in the platform but this one
is the one that works with an annotations server that was specialized
and not generally used by most instances of the platform.

The initial PR to remove this was made by 'lduarte1991' and can be found
here: https://github.com/edx/edx-platform/pull/17299

The work done based on the squashed commits:
removed advanced modules config for annotations
remove module files and config for annotations
remove js and css files related to annotations, under ova folders
removed js and css annotator file configs for cms and lms
remove template html files for annotations
removed annotations options from static html book
Added back some files that were originally marked "for OVA" but others used as per acceptance tests
Added back css file configs incorrectly marked as ova
Remove annotation related advanced settings from test.
Correct hls require.js pathing.

INCR-18 Upgrade django-config-models for Python 3 support

Improve CourseListView end point latency by removing CourseWaffleFlag.

ARCH-164: Add oauth_dispatch metrics.

LEARNER-4467

Merge pull request #18573 from edx/testeng/bokchoy_auto_cache_update_45aa4f7de62a1d1222e1dceb878f07217eb0358c

Bokchoy db cache update

ARCH-164

Fixed bug involving users that could not be found using 'view this course as' functionality

add condition for existence of course end date to graded_only option

Fix enterprise customer catalog content filter settings value

Merge pull request #18400 from edx/iahmad/ENT-1028-Disable-activation-email-for-learners-activated-via-SSO

Disable activation email for SSO users

This patch would remove CourseListView slow transaction by changing
CourseWaffleFlag to WaffleFlag. This removes extra hit on
WaffleUtil's model (WaffleFlagCourseOverrideModel).

LEARNER-5566

LEARNER-4384 Update intructor unenroll task

Revert "Upgrade DOT to 1.1.2." - Take 1

Import factories/base.js when using webpack to fix nav

Configure MathJax when it's loaded by XBlocks in studio

Run `make upgrade`.

There was an issue with migrations on sandboxes.

This reverts commit 58f6e925

Remove flaky test_edit_raw_html.

Tornado Changelog: http://www.tornadoweb.org/en/stable/releases/v5.1.0.html

EDUCATOR-3186

update studio-frontend package to 1.13.0

Remove flaky studio unit test.

Remove flaky test_library_content_side_bar_help.

Upgrade DOT to 1.1.2 and add paver warning.

When using RequireJS, MathJax was configured in an `init` function
in the RequireJS config. With the switch to Webpack and $script,
that configuration needed to be moved to the dynamic loading done by
$script.

[EDUCATOR-3160]