ARCHBOM-1304: add migration for flags using flag_undefined_default=True

In order to enable us to remove flag_undefined_default, this
updates flags according to alternatives documented in:
https://github.com/edx/edx-platform/blob/master/openedx/core/djangoapps/waffle_utils/docs/decisions/0001-refactor-waffle-flag-default.rst

These flags were updated with a migration:
- enable_checklists_quality
- REJECTED_EXAM_OVERRIDES_GRADE
- ENFORCE_FREEZE_GRADE_AFTER_COURSE_END
- WRITABLE_GRADEBOOK

ARCHBOM-1304

PROD-1565

* remove ENABLE_VIDEO_URL_REWRITE

The temporary waffle flag ENABLE_VIDEO_URL_REWRITE is no
longer needed, becaues the rollout is complete.
See https://openedx.atlassian.net/browse/PROD-62

ARCHBOM-1304

* fix quality

- update ADR to provide more alternatives for updating
the default value of a flag.
- add a `flag_` prefix to the flag metrics
- add module-level note about flag metrics
- add NewRelic query example and warning
- fix typo in toggle annotation

ARCHBOM-1302

AA-142 calendar sync ses

- set up util function to use Amazon SES for sending calendar
  sync emails.
- remove old sailthru code which we originally implemented for
  this functionality
- include ADR on our decision to use SES instead of Sailthru.

[REV-774] Show content type gating upsell when a limited access learner tries to access a timed exam

The temporary waffle flag ENABLE_VIDEO_URL_REWRITE is no
longer needed, becaues the rollout is complete.
See https://openedx.atlassian.net/browse/PROD-62

ARCHBOM-1304

Python Requirements Update

Fixing cgi.escape DeprecationWarning

AA-122 created framework for dates widget on course outline

Otherwise, these learners could start the timer and then be unable to take the exam once they have access to the content
REV-774

- Change cgi.escape to html.escape

- Add quote=False to html.escape

- Use function HTML() to address python-wrap-html warning

Add condition to check whether the user has requested a change to the…

The argument flag_undefined_default is soon to be retired
once ARCHBOM-132 is closed. The following will be used to
help ensure the rollout is complete.

- Add a temporary metric if flag_undefined_default is used.
- Add deprecation warning for flag_undefined_default.
- Add minor fix for waffle flag metric when no request found.

ARCHBOM-132

Python Requirements Update

Add condition to check whether the user has requested a change to the proctoring_provider Advanced Setting. In the case that the setting is not available (i.e. the ENABLE_PROCTORING_PROVIDER_OVERRIDES waffle flag is not enabled for the course), the requested proctoring_provider will be None. We should consider, in this case, that the user has not requested a change to the proctoring_provider setting and therefore should not prevent the user from saving course settings if the other conditions for preventing changes to the proctoring_provider setting are met.

[BD-6] Update dicts order to fix tests

edx-ora2==2.4.8
edx-submissions==3.1.11

We are changing how we handle updates to a waffle flag
default, and the ADR explains why and how.

ARCHBOM-1303

The previous version of this code used the Django Setting
ENABLE_WAFFLE_FLAG_METRIC to determine whether to add a single
metric with a dict of details about all flags. Due to
NewRelic's 256 character limit on the metric value, this was
getting truncated.

This new version instead uses the Django Setting
WAFFLE_FLAG_CUSTOM_METRICS, a list of waffle flag names to
instrument.

The name of each custom metric will match the name of the flag.
The value of the custom metric could be False, True, or Both.

The value Both would mean that the flag had both a True and False
value at different times during the transaction. This is most
likely due to having a check_before_waffle_callback, as is the
case with CourseWaffleFlag.

ARCHBOM-132

update requirements post edx-enterprise change

AA-184: Fix extension dashboard for self-paced courses

* updated confirm_email field type and removed confirm email form v1 

Change some tests dict order to fix assertion after python 3.7 change of preserving insertion order in dicts.

rename blacklist/whitelist to exclude list/include list in Course Met…

Upgrade to 1.0.0 caused issues which are described and being
investigated in https://github.com/django-ses/django-ses/issues/186.