dillon1000/react

[DevTools] feat[Tree]: set initial scroll offset when inspected element index is set (#31968)

Stacked on https://github.com/facebook/react/pull/31956. See [commit on
top](https://github.com/facebook/react/pull/31968/commits/ecb8df4175342cde7669cd4a6b008b3782eb5b61).

Use `initialScrollOffset` prop for `FixedSizeList` from `react-window`.
This happens when user selects an element in built-in Elements panel in
DevTools, and then opens Components panel from React DevTools - elements
will be synced and corresponding React Element will be pre-selected, we
just have to scroll to its position now.