Fix issue with shared log axis

[oscargus]

Co-authored-by: Antony Lee anntzer.lee@gmail.com

PR Summary

Closes #14527

PR Checklist

Documentation and Tests

• Has pytest style unit tests (and pytest passes)
• Documentation is sphinx and numpydoc compliant (the docs should build without error).
• New plotting related features are documented with examples.

Release Notes

• New features are marked with a .. versionadded:: directive in the docstring and documented in doc/users/next_whats_new/
• API changes are marked with a .. versionchanged:: directive in the docstring and documented in doc/api/next_api_changes/
• Release notes conform with instructions in next_whats_new/README.rst or next_api_changes/README.rst

[oscargus]

The question here is if this should go into 3.7 and if so, if it should go as is (to be modified in 3.8 to use _get_shared_axis()) or if #24983 should go in 3.7 as well.

[oscargus]

I checked 'symlog' and 'logit' and the original issue is not there.

[timhoffm]

Possibly modulo @greglucas's suggestion to check axis limits explicitly instead of an image test.

[oscargus]

Now checking the limits (and tick-locations).

(I wonder why the "Need rebase" label was not added automatically?)