[Bug Report] table columns changes it’s width refreshed delay

### Element UI version
2.15.10

### OS/Browsers version
win10

### Vue version
2.7.13

### Reproduction Link
https://github.com/ElemeFE/element/tree/dev/packages/table

### Steps to reproduce
1. two buttons control same content show 2 diffrent table(has diffrent columns),
2. when insert new column into table,it's width is 0,The height is stretched by the length of the text。Shows the hight flicker of a table head

### What is Expected?
no hight flicker of a table head

### What is actually happening?
Shows the hight flicker of a table head