Resolve deprecation warnings in Docs/tools

Documentation

The following scripts are throwing deprecation warnings.

PendingDeprecationWarning: nodes.Node.traverse() is obsoleted by Node.findall()

findall instead of traverse for docutils nodes

Looks like this is from docutils 0.18.1 (2021-11-23):

New method Node.findall(): like Node.traverse() but returns an iterator. Obsoletes Node.traverse().

gh-119317: findall instead of traverse for docutils nodes (#119319)

pythongh-119317: findall instead of traverse for docutils nodes (pyth…

[3.12] gh-119317: findall instead of traverse for docutils nodes (GH-…

[3.13] gh-119317: findall instead of traverse for docutils nodes (GH-…

pythongh-119317: findall instead of traverse for docutils nodes (pyth…