Summary

Some example files have "something_test.py" in their name which can be picked up as tests and isn't really a clear example name. These could probably be renamed.

Identified in: #23130

Example of a poor name: https://github.com/matplotlib/matplotlib/blob/main/examples/scales/log_test.py

cc: @matthewfeickert

Proposed fix

Update all non-test files with "test" in their name to something else.