🐛 [BUG] 当折线图 存在 color 回调 和 rawFields配置的时候， legend 影响 y轴伸缩的交互 将失效。


`配置`
`import { Line } from '@antv/g2plot';

fetch('https://gw.alipayobjects.com/os/bmw-prod/55424a73-7cb8-4f79-b60d-3ab627ac5698.json')
.then((res) => res.json())
.then((data) => {
const line = new Line('container', {
data,
xField: 'year',
yField: 'value',
seriesField: 'category',
color:()=>'pink',
rawFields:['value','category'],
});

line.render();
});
`

* **G2Plot Version*2.2.39*:

Start with the Line chart configuration in issue #2948 and reproduce it using the linked JSON data, color callback, and rawFields ['value','category']. Inspect the legend interaction and y-axis scaling behavior. Done means legend toggling still changes the y-axis extent with this configuration.

Written by the indexing model from the issue text.