dillon1000/react

fix[devtools]: fixed duplicated backend activation with multiple renderers (#26807)

## Summary
Initially reported in https://github.com/facebook/react/issues/26797.
Was not able to reproduce the exact same problem, but found this case:

1. Open corresponding codepen from the issue in debug mode
2. Open components tab of the extension
3. Refresh the page

Received multiple errors:
- Warning in the Console tab: Invalid renderer id "2".
- Error in the Components tab: Uncaught Error: Cannot add node "3"
because a node with that id is already in the Store.

This problem has occurred after landing a fix in
https://github.com/facebook/react/pull/26779. Looks like Chrome is
keeping the injected scripts (the backend in this case) and we start
backend twice.