Python 3.10 builds require a fix in Sphinx, so let's update all docs
dependencies while we're at this.
Unfortunately, the myst-parser requires docutils<0.18,>=0.15 so we
cannot take the latest and greatest of that one.
After this update, sphinxcontrib-bibtex now requires an explicit
reference to the .bib files directly in the config file. Let's remove
the one in the actual docs, then.
Bug: https://github.com/sphinx-doc/sphinx/pull/9513
Change-Id: I80f62131b25f3afa23351646001f6ce381723487
Also make sure that all modules are covered. It seems that there's no
automatic way for doing this, aargh. On the other hand, there's
apparently no need to repeat all the Sphinx markup blurb, and even
sectioning works nicely (read, "as I expect it to work") now :). I think
that it's still necessary to keep these "intermediate files" that only
trigger package-level and module-level autodocs, but hey, I can live
with this.
Change-Id: I705e0054cd7cd4350171770795d69f5c15c226d6
