[Bug Report] [el-tooltip] Can't create el-tooltip with createElement

### Element UI version
2.15.1

### OS/Browsers version
chromium Version 89.0.4389.82 (Official Build) snap (64-bit)

### Vue version
2.6.12

### Reproduction Link
https://jsfiddle.net/r647501s/

### Steps to reproduce
nothing is render when the app is mount (just blank)

### What is Expected?
render the tooltip

### What is actually happening?
rendering nothing