eps1lon e591dc44ab Fix Flow types of useEffectEvent (#26468)
## Summary

Just copied the types over from the internal types. Type error was
hidden by overly broad FlowFixMe. With `$FlowFixMe[not-a-function]` we
would've seen the actual issue:
```
Cannot return `dispatcher.useEffectEvent(...)` because  `T` [1] is incompatible with  undefined [2].Flow(incompatible-return)
```

## How did you test this change?

- [x] yarn flow dom-node
- [x] CI

DiffTrain build for commit https://github.com/facebook/react/commit/d12bdcda69afd219f4d91cbd60d6fae2a375d35b.
2023-03-25 19:28:44 +00:00
2023-02-20 16:27:42 +00:00
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