Test failure with Docutils HEAD since r10229, Docutils 0.22.1, and Docutils 0.22.2

[gmilde]

Describe the bug

Since Docutils commit [r10229], the "Docutils HEAD" test suite fails.
The reason is an incomplete setup of a mock state instance in test_util_docutils_sphinx_directive.make_directive_and_state().
This is fixed in PR #13883

How to Reproduce

Run the test suite.

Environment Information

Docutils from the repository since r10229 or Docutils 0.22.1.

[gmilde]

This also affects Docutils 22.1 (2025-09-17).

[gmilde]

... and Docutils 0.22.2 (2025-09-20).