fix: 新增图表解绑，解决内存泄漏问题

Author: Davont

packages/vue/src/chart/chart-core/src/chart-core.ts

@@ -540,6 +540,8 @@ export default {
     this.afterSetOptionOnce && this.afterSetOptionOnce(this.integrateChart.echartsIns)
   },
   beforeUnmount() {
+    this.integrateChart = null
+    if (this.integrateChart.uninstall) this.integrateChart.uninstall()
     this.watchToPropsEchartOptions.forEach((unwatch) => {
       unwatch && unwatch()
     })