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.
