Set plot_centroids to False when plotting

[itsdawei]

Description

cvt_archive_heatmap.Previously, we set plot_centroids to True by default. However, it is easy to mistake the centroids for the solution points. Furthermore, the centroids are usually not immediately useful; for instance, our arm repertoire tutorial turns off the centroids by default.

TODO

• [x] Change default value
• [x] Add test for cvt archive heatmap with centroids
• [x] Update test images
• [x] Update arm repertoire tutorial

Questions

Status

• [x] I have read the guidelines in CONTRIBUTING.md
• [x] I have formatted my code using yapf
• [x] I have tested my code by running pytest
• [x] I have linted my code with pylint
• [x] I have added a one-line description of my change to the changelog in HISTORY.md
• [x] This PR is ready to go