Support clusterers in DecisionBoundaryDisplay #33119
Description
Describe the workflow you want to enable
So far, response_method="auto" does not resolve correctly (list of options as for classifiers instead of predict).
The approach I implemented is: using PCA, followed by DBSCAN and Logistic Regression as a final step.
Properly showing the relevant datapoints, categorised/colored by their identified clusters, would be great without an extra call to scatter.
Describe your proposed solution
As per discussion linked below, proper support for clusterers should be added to DecisionBoundaryDisplay.
Describe alternatives you've considered, if relevant
Simply plotting a scatterplot on top does not necessarily yield the same class colors, because the clusters are not necessarily ordered in the same way as the y values.