TCRain dist to coast trick no longer effective

[emanuel-schmid]

In the TC_Rain tutorial the preset dist_to_coast column of the Bangladesh Centroids are (ab)used to create hazard plots with offshore intensities blanked out. (?)

This won't work anymore in Climada 5.0, because the dist_to_coast attribute is always calculated on the fly.

If we want to keep the behavior I'd suggest to implement an additional argument in TCRain.from_tracks(ignore_offshore=False) that does not blank out centroids far away from the coastline like (max_dist_inland_km) but those offshore.