fix(components): [table-v2] use keep-alive position top error (#20813)

* fix(components): [table-v2] use `keep-alive` position top error

* chore: del useless code

* chore: del useless code

* chore: add nextTick

packages/components/table-v2/src/table-grid.tsx

@@ -2,6 +2,8 @@ import {
   computed,
   defineComponent,
   inject,
+  nextTick,
+  onActivated,
   provide,
   ref,
   unref,
@@ -175,6 +177,12 @@ const TableGrid = defineComponent({
 
     provide('tableV2GridScrollLeft', scrollLeft)
 
+    onActivated(async () => {
+      await nextTick()
+      const scrollTop = bodyRef.value?.states.scrollTop
+      scrollTop && scrollToTop(Math.round(scrollTop) + 1)
+    })
+
     expose({
       forceUpdate,
       /**