Refactor test_image to plot @circuit.png instead of test_logo.png

[weiji14]

Description of proposed changes

So that we don't need to pull test_logo.png from dvc, or run test_logo first to generate the image.

The circuit.png file is from https://github.com/GenericMappingTools/gmtserver-admin/blob/master/cache/circuit.png

Fixes #2911 (comment), patches #2079 (comment), fixes #518 (comment)

Reminders

• Run make format and make check to make sure the code follows the style guide.
• Add tests for new features or tests that would have caught the bug that you're fixing.
• Add new public functions/methods/classes to doc/api/index.rst.
• Write detailed docstrings for all functions/methods.
• If wrapping a new module, open a 'Wrap new GMT module' issue and submit reasonably-sized PRs.
• If adding new functionality, add an example to docstrings or tutorials.
• Use underscores (not hyphens) in names of Python files and directories.

Slash Commands

You can write slash commands (/command) in the first line of a comment to perform
specific operations. Supported slash commands are:

• /format: automatically format and lint the code
• /test-gmt-dev: run full tests on the latest GMT development version

[github-actions]

Summary of changed images

This is an auto-generated report of images that have changed on the DVC remote

Status	Path
modified	pygmt/tests/baseline/test_image.png

Image diff(s)

Details

Added images

Modified images

Path	Old	New
test_image.png

Report last updated at commit 121e589

[seisman]

OK to merge if all tests pass.

[weiji14]

Gonna try removing this line and see if it still crashes on Windows. Xref #518 (comment).

[weiji14]

Oo, test_image no longer crashes on Windows with GMT 6.3 (see https://github.com/GenericMappingTools/pygmt/actions/runs/7334833328/job/19971998592?pr=2922#step:7:508) and GMT 6.4 (see https://github.com/GenericMappingTools/pygmt/actions/runs/7334833574/job/19971999909?pr=2922#step:8:473) 🎉

[weiji14]

Marking as 'ready for review' to run tests on Windows. Still need to revert the uncommented pull_request: lines before merging.

[weiji14]

Do we still want to wait for ghostscript 10.02.1 first @seisman? Xref #2694.

[seisman]

Do we still want to wait for ghostscript 10.02.1 first @seisman? Xref #2694.

I think we can merge this PR now, so that you can continue with benchmarks.