Ability to use custom aggregate functions and custom tooltip for Hexbin(layer type: hexagon)

Hi, Team,

Do we support custom tooltip for Hexbin, now I see the Hexbin tooltip only display "total points", actually we don't want to use this label, we want to list more information in the tooltip

Thanks

Start by locating the Hexbin layer implementation and the tooltip behavior that currently displays only "total points." Define how custom aggregate functions and additional tooltip information should be configured, then verify that custom labels and data appear correctly in Hexbin tooltips.

Written by the indexing model from the issue text.