[Feature] label和主图元同等地位，触发mark

[neuqzxy]

What problem does this feature solve?

hover到label后，无法展示mark的tooltip

What does the proposed API look like?

没有API

[neuqzxy]

https://github.com/VisActor/VChart/pull/3687 @xiaoluoHe 这个之前的修复貌似有问题，没生效

const spec = {
  type: 'scatter',
  data: [
    {
      id: 'id0',
      values: [
        { x: '1', y: 22 },
        { x: '2', y: 43 },
        { x: '3', y: 33 },
        { x: '4', y: 22 },
        { x: '5', y: 10 },
        { x: '6', y: 30 },
        { x: '7', y: 46 },
        { x: '8', y: 21 },
        { x: '9', y: 33 },
        { x: '10', y: 43 },
        { x: '11', y: 42 },
        { x: '12', y: 30 },
        { x: '13', y: 9 },
        { x: '14', y: 46 }
      ]
    }
  ],
  tooltip: {
    dimension: {
      visible: false
    }
  },
  xField: 'x',
  yField: 'y',
  label: {
    visible: true,
    showRelatedMarkTooltip: true,
    style: {
      showRelatedMarkTooltip: true,
    }
  }
};

const vchart = new VChart(spec, { dom: CONTAINER_ID });

vchart.renderSync();

[xiaoluoHe]

#3687 @xiaoluoHe 这个之前的修复貌似有问题，没生效

需要开启 label 交互

  label: {
    visible: true,
    interactive: true,
    showRelatedMarkTooltip: true,
  }