Figure.directional_rose/Figure.magnetic_rose: Set the default position to the top right

[seisman]

Description of proposed changes

For GMT<=6.6.0, the position argument is required when plotting directional or magnetic roses. When implementing Figure.directional_rose and Figure.magnetic_rose in PyGMT, we decided to set the default position to the "bottom left" corner.

In a recent PR GenericMappingTools/gmt#9074, the default position was changed to "Top Right." As a result, the default positions will be inconsistent between GMT and PyGMT.

Fortunately, Figure.directional_rose and Figure.magnetic_rose were added recently and have not yet been released. This gives us the opportunity to change the default behavior without breaking backward compatibility.

This PR updates the default position.

[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_directional_rose.png
modified	pygmt/tests/baseline/test_directional_rose_fancy.png
modified	pygmt/tests/baseline/test_magnetic_rose.png

Image diff(s)

Details

Added images

Modified images

Path	Old	New
test_directional_rose.png
test_directional_rose_fancy.png
test_magnetic_rose.png

Report last updated at commit 8e9e93e

[yvonnefroehlich]

I agree the default position should be consistent across GMT and PyGMT.

[yvonnefroehlich]

Seems like we have to do similar changes to Figure.inset (xref GenericMappingTools/gmt#9077), if we want consistent default positions for the plotting embellishments.