We weren't using our improved JSON writer for the RBTools documentation

and release notes, which meant we weren't getting the Table of Contents

and other metadata embedded in the output. This forced the building to

take place server-side, utilizing legacy code that isn't compatible with

modern versions of Sphinx. We now make use of the improved JSON writer

to fix this.
We also had a couple of regressions in our docs.
The new code for showing deprecated/renamed options introduced a syntax

error in the generated ReST, with the document body not being indented

within the directive. This has been fixed.
On newer Pythons, autodoc would look for an __annotate_func__, which

led to all kinds of errors. We now include this in the exclude list.

Built the docs. Saw that these errors went away.
Consumed the new docs in the website codebase, and it properly showed

the Table of Contents based on the modern metadata.