PR Summary

closes#17130

Adds support for auto-scaling 3D collection objects in the add_collection3d function. The new implementation is consistent with the behavior of the existing 2D implementation, where auto-scaling is True by default.

Test cases were added for each of the relevant autoscaling functions.

The autoscaling works with most 2D/3D collections; the only collection I wasn't able to get working was Patch3DCollection, which (as far as I can tell) seems to have a number of ongoing bugs that make them borderline unusable, and untestable.

Also turns out that a few of the test cases suffered from the bug seen in#17130, so I updated the failing tests accordingly.

PR Checklist

Linked Issue

• Added "closes #0000" in the PR description to link it to the original issue.

Documentation and Tests

• Has pytest style unit tests (andpytest passes)
• Documentation is sphinx and numpydoc compliant (the docs shouldbuild 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 indoc/users/next_whats_new/
• API changes are marked with a.. versionchanged:: directive in the docstring and documented indoc/api/next_api_changes/
• Release notes conform with instructions innext_whats_new/README.rst ornext_api_changes/README.rst