[BD-10] [DEPR-79] Remove pattern library of mobile/course-dates-fragment.html

[BD-10] [DEPR-70] Remove waffle flag edx_discussions.use_bootstrap. 

[BD-10] [DEPR-78][DEPR-82] Remove pattern library of latest-update-fragment.html and welcome-message-fragment.html

[BD-6] Fix python 3.8 compatibility

Mergeback PR from private to public.

Sustaining xsslint security fixes

[BD-10] [DEPR-83]

Removed confirm email after SSO

Use transifex client from PyPi since required change was merged recently.

MST-234

[PROD-1230] - syncing certificates on course update on credential side.

Revert "BOM-1703 : Ora2 Upgrade"

This reverts commit f3161468.

Revert "Add demographics prompt to edx.org theme"

AA-181: Updating Outline Tab API to include Course Blocks

AA-133 mfe dates banner

- add serializer mixin to expose date banner info
- add endpoint to reset deadlines for a sepcific course

[BD-5] [BB-2503] Add 'ENABLE_ORA_USERNAMES_ON_DATA_EXPORT' feature toggle

Add demographics prompt to edx.org theme

Change switch to waffle flag.

Guard highlights against null module

Sometimes a course module will not exist and was causing exceptions
in our weekly highlights mail code. This will hopefully guard against
that a bit better.

- Add bootstrap utility function to lms-base-v1 CSS
- Moved coaching sass to edx.org theme
- Banner feature flag and MB program gated

In an earlier PR, we moved logic from process_view to process
request, so mapping would happen earlier in the middleware
lifecycle, and the code_owner metric would be set for requests
that never made it to process_view.

The temp_view_func_compare custom metric was added temporarily to
ensure this earlier refactor did not introduce any unaccounted for
differences. It did not, so we are removing this temporary metric.

ARCHBOM-1263

Upgrade transifex-client version.

This is only made in order to run the tests with a transifex-client version compatible with python3.8

The actual problem that we have in edx-platform is that the last version of transifex-client has as constraint python-slugify<2.0.0 which is not compatible with the current requierements of edx-platform on the other hand, the current version used in edx-platform is not compatible with python3.8