Enable mouse wheel scrolling for scrollbars #3605

• I have searched the issues of this repository and believe that this is not a duplicate.

What problem does this feature solve?

It is now possible to scroll a chart only by dragging the scollbar's thumb. It would be handier to use a mouse wheel instead. There is a similar request for G2Plot.

What does the proposed API look like?

The required scrollbar behavior can be configured either in a scrollbar's option:

scrollbar: {
   type: "horizontal",
   enableMouseWheel: true
}

or by using the chart's interactions list:

chart.interaction('plot-mousewheel-scroll');

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