dillon1000/react

Include the function name for context on invalid function child (#28362)

Also warn for symbols.

It's weird because for objects we throw a hard error but functions we do
a dev only check. Mainly because we have an object branch anyway.

In the object branch we have some built-ins that have bad errors like
forwardRef and memo but since they're going to become functions later, I
didn't bother updating those. Once they're functions those names will be
part of this.