Synchronously flush the transition lane scheduled in a popstate event (#26025)

Summary:
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## Summary

Browsers restore state like forms and scroll position right after the
popstate event. To make sure the page work as expected on back or
forward button, we need to flush transitions scheduled in a popstate
synchronously, and only yields if it suspends.
This PR adds a new HostConfig method to check if `window.event ===
'popstate'`, and `scheduleMicrotask` if a transition is scheduled in a
`PopStateEvent`.

## How did you test this change?

yarn test

DiffTrain build for commit https://github.com/facebook/react/commit/d121c67004a2e6b0bb5d341843663ef213f64863.

Reviewed By: kassens

Differential Revision: D45145742

Pulled By: sammy-SC

fbshipit-source-id: 196fe3539ee8588a31012d6af86a5ce0cd7fc973

packages/react-native/Libraries/Renderer/REVISION

@@ -1 +1 @@
-7b0642bb989ec659c6c9891ea16daa0420caab4d
+d121c67004a2e6b0bb5d341843663ef213f64863