This reverts commit 27480a25.

* Updating Python Requirements

* Constrain django-cookies-samesite until dep bug fixed

* Fix PEP 8 problems revealed by pycodestyle upgrade

Co-authored-by: Tim McCormack <tmccormack@edx.org>
Co-authored-by: Jeremy Bowman <jbowman@edx.org>

Revert "Dark launch: Fix site shadowing and 1+N queries in third party auth config fetching (#23824)" (#23935)

This reverts commit 79420640.

This performs a dark launch compare of the existing implementation
(still in use) for fetching TPA provider configs and a new
implementation, recording metrics on exceptions and mismatches.

The new implementation should have two benefits, once we're switched
over:

- Fix 1+N queries on login page view where the site for each config
  was fetched in a loop (ARCHBOM-1139)
- Don't allow configs with the same key on different sites to
  interfere with each other (regression test added)

The new impl does not use TieredCache, but only the request cache,
which we may want to adjust later.

Improved authentication metrics.

This adds a graded icon for LTI units. This was meant to go into
a recent commit, but I only updated github.in not the txt requirement
files.

AA-75

This adds a missing migration file to change the plural name of a
model.

These were pinned because they drop support for Django<2.2 (or were
planning on it, in the latter case.)

No related changes in computed requirements.

ARCHBOM-1105

TNL-7184

and settings to set SameSite=None for all secure cookies.

This update pulls in transitioning various contains content calls to
use the new enterprise catalog service behind a waffle flag.

ENT-2575