Wrap preact.Fragment with preact.createElement

[caroqliu]

While preact.Fragment is a function, react.Fragment is not. This PR nests with preact.createElement to account for remapping preact -> react. Fixes #35412. Related to #35678

[developit]

Might also be worth considering having this return props.children to avoid the nesting altogether. Using <Fragment key="" /> will still work like it would on a Fragment, because it'll be applied to the component:

function Fragment(props) {
  return props.children;
}

[caroqliu]

Might also be worth considering having this return props.children to avoid the nesting altogether. Using <Fragment key="" /> will still work like it would on a Fragment, because it'll be applied to the component:

function Fragment(props) {
  return props.children;
}

Thanks for the recommendation, updated.