We should allow to customize the color palette, that is used in Kibana for visualization colors (and maybe more). That way users could customize them to company specific color schemes or in general fit their needs. The color pickers should reflect that customized color palette, as charts should use that color palette by default to generate their colors.

Optionally we might want to think about multiple color palettes, so you can select a different color palette per chart, that is used to seed the chart colors.

Supersedes #10173