Merge topic 'doc-cmake.org-tutorial-archive' into release-3.23

4cb616fed6 Tutorial: Provide a source archive when published on cmake.org
37fb70591e Utilities/Sphinx: Add variables listing pre-sphinx commands
eb7d913a21 Utilities/Sphinx: Clarify names of variables listing post-sphinx commands

Acked-by: Kitware Robot <kwrobot@kitware.com>
Merge-request: !7215