Backport of pr 27647 on v3.8.x

[dstansby]

Fix error that occurs when minorticks are on multi-Axes Figure with more than one boxplot

(cherry picked from commit b03407b)

PR summary

PR checklist

• "closes #0000" is in the body of the PR description to link the related issue
• new and changed code is tested
• Plotting related features are demonstrated in an example
• New Features and API Changes are noted with a directive and release note
• Documentation complies with general and docstring guidelines

[ksunden]

Was the conflict just that the bottom of the test file was edited?

[dstansby]

No, the conflict was in ticker.py. I think because the lines directly under the line changed are different on main and 3.8.x?

[tacaswell]

The test coverage drop is due to the german language pack being missing. Don't think we backported that.