This breaks in some cases, so just use function parameters instead.

Call sphinx-build in a similar way as lisa-doc-build so that old
branches build correctly.

We don't have a 23.04 runner

Use Ubuntu 23.04 for a version of pandoc that is supported by Sphinx.

FIX

FIX

If hooks directory does not exist, create it.

Build doc for both preview and main branches

FIX

Avoid preparing the repo every time conf.py is imported by a Sphinx
child process.

Make the autobranch job fail if there is any vulnerability detected in
installed Python packages

FIX

Since we use a script entry point, remove the call to main() upon
import in the main module.

FIX