Big data dense points (about 7000 points are piled up in a small area) line graph, double image after scrolling zoom

### Version
5.1.2

### Reproduction link
[https://www.makeapie.com/editor.html?c=xdjG0kwpvu&v=1](https://www.makeapie.com/editor.html?c=xdjG0kwpvu&v=1)

### Steps to reproduce
After opening the link, move the mouse to the data point and zoom in

### What is expected?
Zoom in without ghosting

### What is actually happening?
Double image after scroll wheel zoom in

Open the provided reproduction link with ECharts 5.1.2, use the mouse over the dense line-chart points, and reproduce the double image during scroll-wheel zoom. Trace the line-chart zoom and rendering path responsible for the ghosting, then verify that zooming the roughly 7,000 piled-up points no longer leaves a duplicate image.

Written by the indexing model from the issue text.