build!: Switch to openedx-core (renamed from openedx-learning)
Instead of installing openedx-learning==0.32.0, we install openedx-core==0.34.1.
We update various class names, function names, docstrings, and comments to
represent the rename:
* We say "openedx-core" when referring to the whole repo or PyPI project
* or occasionally "Open edX Core" if we want it to look nice in the docs.
* We say "openedx_content" to refer to the Content API within openedx-core,
which is actually the thing we have been calling "Learning Core" all along.
* In snake-case code, it's `*_openedx_content_*`.
* In camel-case code, it's `*OpenedXContent*`
For consistency's sake we avoid anything else like oex_core, OeXCore,
OpenEdXCore, OexContent, openedx-content, OpenEdxContent, etc.
There should be no more references to learning_core, learning-core, Learning Core,
Learning-Core, LC, openedx-learning, openedx_learning, etc.
BREAKING CHANGE: for openedx-learning/openedx-core developers:
You may need to uninstall openedx-learning and re-install openedx-core
from your venv. If running tutor, you may need to un-mount openedx-learning,
rename the directory to openedx-core, re-mount it, and re-build.
The code APIs themselves are fully backwards-compatible.
Part of: https://github.com/openedx/openedx-core/issues/470
c70bfe980a