dillon1000/react

[DevTools] permanently polyfill for rAF in devtools_page (#26193)

## Summary

We had this as a temporary fix for #24626. Now that Chrome team decides
to turn the flag on again (with good reasons explained in
https://bugs.chromium.org/p/chromium/issues/detail?id=1241986#c31), we
will turn it into a long term solution.
In the future, we want to explore whether we can render React elements
on panel.html instead, as `requestAnimationFrame` produces higher
quality animation.

## How did you test this change?

Tested on local build with "Throttle non-visible cross-origin iframes"
flag enabled.