Support standard formatters in axisartist.

[anntzer]

Ideally, axisartist-specific formatters (and locators) should be deprecated and removed in the future.

Closes #18295 (see the modified test & baseline image for an example).

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

Didn't notice that the tests failed...

[anntzer]

Indeed, fixed (some arch-dependent baseline image apparently...). Unfortunately there seems to remain a tiny bit of arch-dependent stuff which makes it impossible to have strictly the same baseline image on GHA CI and on Azure CI (setting tol to zero and having a passing test on GHA results in an image mismatch on Azure) so I left a tiny tol (less that previously) on the test.