refactor: move production defaults to common modules (#37045)

In the effort to simplify settings in edx-platform, as discussed in ADR 22 -
Settings Simplification, this PR brings some of the production defaults defined
in `lms/envs/production.py` and `cms/envs/production.py` up to
`openedx/envs/common.py` or `lms/envs/common.py` and `cms/envs/common.py` as
appropriate.

Bringing these defaults up from the `production.py` settings modules caused
changes in the rendered settings of the `test.py` modules, and so I have
settings to the `test.py` modules to bring the rendered settings back in line
with what is has been. I have not deeply looked at which settings are needed
for tests to pass or not, but just the differences between the rendered
settings between `master` and this branch.

ADR 22: https://github.com/openedx/edx-platform/blob/master/docs/decisions/0022-settings-simplification.rst
Fixes https://github.com/openedx/edx-platform/issues/36892.

openedx/core/djangoapps/user_authn/toggles.py

@@ -8,15 +8,6 @@ from django.conf import settings
 from openedx.core.djangoapps.site_configuration import helpers as configuration_helpers
 from openedx.core.djangoapps.theming.helpers import get_current_request
 
-# .. toggle_name: ENABLE_REQUIRE_THIRD_PARTY_AUTH
-# .. toggle_implementation: DjangoSetting
-# .. toggle_default: False
-# .. toggle_description: Set to True to prevent using username/password login and registration and only allow
-#   authentication with third party auth
-# .. toggle_use_cases: open_edx
-# .. toggle_creation_date: 2020-09-16
-# .. toggle_warning: Requires configuration of third party auth
-
 
 def is_require_third_party_auth_enabled():
     # TODO: Replace function with SettingToggle when it is available.