[Feature] Cursor change option for Heatmaps

### What problem does this feature solve?

Currently (v^5.4.1), the bar and line chart types have cursor change option. It would be really helpful to have cursor change option on the heatmap, and others.

### What does the proposed API look like?

```
{
type: 'heatmap' ,
id ... ,
name ... ,
coordinateSystem: 'cartesian2d' ,
xAxisIndex: 0 ,
yAxisIndex: 0 ,
geoIndex: 0 ,
calendarIndex: 0 ,
pointSize: 20 ,
blurSize: 20 ,
minOpacity: 0 ,
maxOpacity: 1 ,
cursor: 'pointer'
}
```

Compare how the existing bar and line chart types expose their cursor change option, then inspect the heatmap series configuration. Done means the proposed cursor: 'pointer' option is accepted for heatmaps and changes the cursor as requested.

Written by the indexing model from the issue text.