ScatterGL doesn't show tooltip when hovering on item

### Version
4.6.0

### Steps to reproduce
Using series type ScatterGL to draw a scatter chart.
Set tooltip for series like this:
```
tooltip: {
trigger: "item",
},
series: [{
type: "scatterGL",
data: blahblah,
tooltip: {
position: ['50%', '50%'],
formatter: function() {
return 'tooltip'
}
}
}]
}
```

### What is expected?
Show tooltip for each item when hovering like normal series type Scatter

### What is actually happening?
No tooltip show