sphinx: Remove digest strings and fix sidebar

Summary

sphinx: Remove digest strings and fix sidebar

Inliner is old there are no alternatives so remove the ?digest= and ?v= strings so itcan build the source from the new theme.

Also fix the html_sidebars from the commandline use singlehtml_sidebars.index. The behaviour of html_sidebars was changed in:

https://github.com/sphinx-doc/sphinx/pull/12600

It will no longer take a string from the commandline.

Fixes: #57 (closed), #58 (closed)

(cherry picked from commit dccbedbe)

Co-authored-by: Amar Takhar amar@rtems.org