dillon1000/react

[compiler] Pass through unmodified props spread when inlining jsx (#30995)

If JSX receives a props spread without additional attributes (besides
`ref` and `key`), we can pass the spread object as a property directly
to avoid the extra object copy.

```
<Test {...propsToSpread} />
// {props: propsToSpread}
<Test {...propsToSpread} a="z" />
// {props: {...propsToSpread, a: "z"}}
```