dillon1000/react

fix[react-devtools/store-test]: fork the test to represent current be… (#29777)

## Summary

The test started to fail after
https://github.com/facebook/react/pull/29088.

Fork the test and the expected store state for:
- React 18.x, to represent the previous behavior
- React >= 19, to represent the current RDT behavior, where error can't
be connected to the fiber, because it was not yet mounted and shared
with DevTools.

Ideally, DevTools should start keeping track of such fibers, but also
distinguish them from some that haven't mounted due to Suspense or error
boundaries.